18951956632 has 32 divisors (see below), whose sum is σ = 40757980320. Its totient is φ = 8092938240.

The previous prime is 18951956629. The next prime is 18951956633. The reversal of 18951956632 is 23665915981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18951956633) 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, 595369 + ... + 626392.

It is an arithmetic number, because the mean of its divisors is an integer number (1273686885).

Almost surely, 2^18951956632 is an apocalyptic number.

It is an amenable number.

18951956632 is an abundant number, since it is smaller than the sum of its proper divisors (21806023688).

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

18951956632 is a wasteful number, since it uses less digits than its factorization.

18951956632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222051 (or 1222047 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 55.

The spelling of 18951956632 in words is "eighteen billion, nine hundred fifty-one million, nine hundred fifty-six thousand, six hundred thirty-two".