16740621990 has 96 divisors (see below), whose sum is σ = 48089785536. Its totient is φ = 4018882560.

The previous prime is 16740621959. The next prime is 16740622001. The reversal of 16740621990 is 9912604761.

16740621990 is a `hidden beast` number, since 16 + 7 + 4 + 0 + 621 + 9 + 9 + 0 = 666.

It is a super-2 number, since 2×16740621990² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

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, 202671 + ... + 273050.

It is an arithmetic number, because the mean of its divisors is an integer number (500935266).

Almost surely, 2^16740621990 is an apocalyptic number.

16740621990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16740621990 is an abundant number, since it is smaller than the sum of its proper divisors (31349163546).

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

16740621990 is a wasteful number, since it uses less digits than its factorization.

16740621990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475774 (or 475771 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 16740621990 in words is "sixteen billion, seven hundred forty million, six hundred twenty-one thousand, nine hundred ninety".