21474836160 has 112 divisors (see below), whose sum is σ = 68215898112. Its totient is φ = 5723827200.

The previous prime is 21474836147. The next prime is 21474836171. The reversal of 21474836160 is 6163847412.

It is a super-2 number, since 2×21474836160² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2617665 + ... + 2625855.

Almost surely, 2^21474836160 is an apocalyptic number.

21474836160 is a gapful number since it is divisible by the number (20) 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 21474836160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34107949056).

21474836160 is an abundant number, since it is smaller than the sum of its proper divisors (46741061952).

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

21474836160 is a wasteful number, since it uses less digits than its factorization.

21474836160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10942 (or 10932 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 21474836160 in words is "twenty-one billion, four hundred seventy-four million, eight hundred thirty-six thousand, one hundred sixty".