21182020112 has 40 divisors (see below), whose sum is σ = 44923999680. Its totient is φ = 9595306880.

The previous prime is 21182020103. The next prime is 21182020157. The reversal of 21182020112 is 21102028112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153812 + ... + 256947.

It is an arithmetic number, because the mean of its divisors is an integer number (1123099992).

Almost surely, 2^21182020112 is an apocalyptic number.

21182020112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21182020112 is an abundant number, since it is smaller than the sum of its proper divisors (23741979568).

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

21182020112 is a wasteful number, since it uses less digits than its factorization.

21182020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411071 (or 411065 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21182020112 its reverse (21102028112), we get a palindrome (42284048224).

The spelling of 21182020112 in words is "twenty-one billion, one hundred eighty-two million, twenty thousand, one hundred twelve".