21462630 has 32 divisors (see below), whose sum is σ = 58869504. Its totient is φ = 4905696.

The previous prime is 21462629. The next prime is 21462631. The reversal of 21462630 is 3626412.

It is an interprime number because it is at equal distance from previous prime (21462629) and next prime (21462631).

It is a self number, because there is not a number n which added to its sum of digits gives 21462630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21462631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50892 + ... + 51311.

It is an arithmetic number, because the mean of its divisors is an integer number (1839672).

Almost surely, 2^21462630 is an apocalyptic number.

21462630 is an abundant number, since it is smaller than the sum of its proper divisors (37406874).

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

21462630 is a wasteful number, since it uses less digits than its factorization.

21462630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102220.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 21462630 is about 4632.7777844399. Note that the first 4 decimals coincide. The cubic root of 21462630 is about 277.9036897028.

The spelling of 21462630 in words is "twenty-one million, four hundred sixty-two thousand, six hundred thirty".