18951045120 has 864 divisors, whose sum is σ = 82442924928. Its totient is φ = 4076863488.

The previous prime is 18951045119. The next prime is 18951045143. The reversal of 18951045120 is 2154015981.

18951045120 is a `hidden beast` number, since 1 + 89 + 510 + 45 + 1 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a super-2 number, since 2×18951045120² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1114767352 + ... + 1114767368.

It is an arithmetic number, because the mean of its divisors is an integer number (95420052).

Almost surely, 2^18951045120 is an apocalyptic number.

18951045120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18951045120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41221462464).

18951045120 is an abundant number, since it is smaller than the sum of its proper divisors (63491879808).

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

18951045120 is an frugal number, since it uses more digits than its factorization.

18951045120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The spelling of 18951045120 in words is "eighteen billion, nine hundred fifty-one million, forty-five thousand, one hundred twenty".