18859951292 has 96 divisors (see below), whose sum is σ = 43048091520. Its totient is φ = 7027937280.

The previous prime is 18859951237. The next prime is 18859951373. The reversal of 18859951292 is 29215995881.

It is a super-2 number, since 2×18859951292² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 411008 + ... + 454584.

It is an arithmetic number, because the mean of its divisors is an integer number (448417620).

Almost surely, 2^18859951292 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18859951292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21524045760).

18859951292 is an abundant number, since it is smaller than the sum of its proper divisors (24188140228).

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

18859951292 is a wasteful number, since it uses less digits than its factorization.

18859951292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43671 (or 43669 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 59.

The spelling of 18859951292 in words is "eighteen billion, eight hundred fifty-nine million, nine hundred fifty-one thousand, two hundred ninety-two".