21149862112 has 48 divisors (see below), whose sum is σ = 44380278432. Its totient is φ = 9886924800.

The previous prime is 21149862109. The next prime is 21149862119. The reversal of 21149862112 is 21126894112.

It is a super-2 number, since 2×21149862112² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21149862119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46593 + ... + 210880.

It is an arithmetic number, because the mean of its divisors is an integer number (924589134).

Almost surely, 2^21149862112 is an apocalyptic number.

It is an amenable number.

21149862112 is an abundant number, since it is smaller than the sum of its proper divisors (23230416320).

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

21149862112 is a wasteful number, since it uses less digits than its factorization.

21149862112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257651 (or 257643 counting only the distinct ones).

The product of its digits is 13824, while the sum is 37.

The spelling of 21149862112 in words is "twenty-one billion, one hundred forty-nine million, eight hundred sixty-two thousand, one hundred twelve".