18401456376 has 96 divisors (see below), whose sum is σ = 52727360400. Its totient is φ = 5781404160.

The previous prime is 18401456371. The next prime is 18401456389. The reversal of 18401456376 is 67365410481.

18401456376 is a `hidden beast` number, since 1 + 8 + 4 + 0 + 1 + 4 + 5 + 637 + 6 = 666.

It is a super-2 number, since 2×18401456376² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18401456371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 235356 + ... + 303636.

Almost surely, 2^18401456376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18401456376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26363680200).

18401456376 is an abundant number, since it is smaller than the sum of its proper divisors (34325904024).

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

18401456376 is a wasteful number, since it uses less digits than its factorization.

18401456376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68509 (or 68502 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 18401456376 in words is "eighteen billion, four hundred one million, four hundred fifty-six thousand, three hundred seventy-six".