18616926340 has 24 divisors (see below), whose sum is σ = 40795352640. Its totient is φ = 7122997728.

The previous prime is 18616926329. The next prime is 18616926347. The reversal of 18616926340 is 4362961681.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (18616926347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20235330 + ... + 20236249.

It is an arithmetic number, because the mean of its divisors is an integer number (1699806360).

Almost surely, 2^18616926340 is an apocalyptic number.

18616926340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18616926340 is an abundant number, since it is smaller than the sum of its proper divisors (22178426300).

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

18616926340 is a wasteful number, since it uses less digits than its factorization.

18616926340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40471611 (or 40471609 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 18616926340 in words is "eighteen billion, six hundred sixteen million, nine hundred twenty-six thousand, three hundred forty".