21123714 has 16 divisors (see below), whose sum is σ = 42293952. Its totient is φ = 7033488.

The previous prime is 21123709. The next prime is 21123721. The reversal of 21123714 is 41732112.

It is a super-2 number, since 2×21123714² = 892422586307592, which contains 22 as substring.

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, 7507 + ... + 9929.

It is an arithmetic number, because the mean of its divisors is an integer number (2643372).

Almost surely, 2^21123714 is an apocalyptic number.

21123714 is an abundant number, since it is smaller than the sum of its proper divisors (21170238).

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

21123714 is a wasteful number, since it uses less digits than its factorization.

21123714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881.

The product of its digits is 336, while the sum is 21.

The square root of 21123714 is about 4596.0541772264. The cubic root of 21123714 is about 276.4331310992.

Adding to 21123714 its reverse (41732112), we get a palindrome (62855826).

The spelling of 21123714 in words is "twenty-one million, one hundred twenty-three thousand, seven hundred fourteen".