18849179520 has 384 divisors, whose sum is σ = 71062992000. Its totient is φ = 4761151488.

The previous prime is 18849179467. The next prime is 18849179533. The reversal of 18849179520 is 2597194881.

It is a happy number.

18849179520 is a `hidden beast` number, since 1 + 8 + 8 + 49 + 1 + 79 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 2951691 + ... + 2958069.

It is an arithmetic number, because the mean of its divisors is an integer number (185059875).

Almost surely, 2^18849179520 is an apocalyptic number.

18849179520 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 18849179520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35531496000).

18849179520 is an abundant number, since it is smaller than the sum of its proper divisors (52213812480).

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

18849179520 is an equidigital number, since it uses as much as digits as its factorization.

18849179520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6432 (or 6408 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The spelling of 18849179520 in words is "eighteen billion, eight hundred forty-nine million, one hundred seventy-nine thousand, five hundred twenty".