18201970902 has 16 divisors (see below), whose sum is σ = 36490829760. Its totient is φ = 6052842312.

The previous prime is 18201970859. The next prime is 18201970939. The reversal of 18201970902 is 20907910281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3617608 + ... + 3622635.

It is an arithmetic number, because the mean of its divisors is an integer number (2280676860).

Almost surely, 2^18201970902 is an apocalyptic number.

18201970902 is an abundant number, since it is smaller than the sum of its proper divisors (18288858858).

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

18201970902 is a wasteful number, since it uses less digits than its factorization.

18201970902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7240667.

The product of its (nonzero) digits is 18144, while the sum is 39.

The spelling of 18201970902 in words is "eighteen billion, two hundred one million, nine hundred seventy thousand, nine hundred two".