18642920802 has 256 divisors, whose sum is σ = 47775744000. Its totient is φ = 4776710400.

The previous prime is 18642920767. The next prime is 18642920843. The reversal of 18642920802 is 20802924681.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 25928599 + ... + 25929317.

It is an arithmetic number, because the mean of its divisors is an integer number (186624000).

Almost surely, 2^18642920802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18642920802, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23887872000).

18642920802 is an abundant number, since it is smaller than the sum of its proper divisors (29132823198).

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

18642920802 is a wasteful number, since it uses less digits than its factorization.

18642920802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837.

The product of its (nonzero) digits is 110592, while the sum is 42.

The spelling of 18642920802 in words is "eighteen billion, six hundred forty-two million, nine hundred twenty thousand, eight hundred two".