18951458808 has 32 divisors (see below), whose sum is σ = 47867092560. Its totient is φ = 6252026880.

The previous prime is 18951458803. The next prime is 18951458809. The reversal of 18951458808 is 80885415981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18951458803) 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, 4068003 + ... + 4072658.

Almost surely, 2^18951458808 is an apocalyptic number.

It is an amenable number.

18951458808 is an abundant number, since it is smaller than the sum of its proper divisors (28915633752).

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

18951458808 is a wasteful number, since it uses less digits than its factorization.

18951458808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8140767 (or 8140763 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 57.

The spelling of 18951458808 in words is "eighteen billion, nine hundred fifty-one million, four hundred fifty-eight thousand, eight hundred eight".