13918021740 has 648 divisors, whose sum is σ = 54385072560. Its totient is φ = 2864429568.

The previous prime is 13918021739. The next prime is 13918021753. The reversal of 13918021740 is 4712081931.

It is a happy number.

It is a super-2 number, since 2×13918021740² (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 = 13918021695 and 13918021704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 88649742 + ... + 88649898.

Almost surely, 2^13918021740 is an apocalyptic number.

13918021740 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 13918021740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27192536280).

13918021740 is an abundant number, since it is smaller than the sum of its proper divisors (40467050820).

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

13918021740 is a wasteful number, since it uses less digits than its factorization.

13918021740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 13918021740 in words is "thirteen billion, nine hundred eighteen million, twenty-one thousand, seven hundred forty".