16690052340 has 144 divisors (see below), whose sum is σ = 54562107600. Its totient is φ = 4105211904.

The previous prime is 16690052297. The next prime is 16690052377. The reversal of 16690052340 is 4325009661.

It is a happy number.

16690052340 is a `hidden beast` number, since 1 + 6 + 6 + 90 + 0 + 523 + 40 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 450627984 + 16239424356 = 21228^2 + 127434^2 .

It is a super-2 number, since 2×16690052340² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16690052295 and 16690052304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5401516 + ... + 5404604.

It is an arithmetic number, because the mean of its divisors is an integer number (378903525).

Almost surely, 2^16690052340 is an apocalyptic number.

16690052340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16690052340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27281053800).

16690052340 is an abundant number, since it is smaller than the sum of its proper divisors (37872055260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16690052340 is a wasteful number, since it uses less digits than its factorization.

16690052340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5426 (or 5421 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 16690052340 in words is "sixteen billion, six hundred ninety million, fifty-two thousand, three hundred forty".