21463628 has 12 divisors (see below), whose sum is σ = 37666272. Its totient is φ = 10701840.

The previous prime is 21463621. The next prime is 21463633. The reversal of 21463628 is 82636412.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21463594 and 21463603.

It is not an unprimeable number, because it can be changed into a prime (21463621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5843 + ... + 8778.

It is an arithmetic number, because the mean of its divisors is an integer number (3138856).

Almost surely, 2^21463628 is an apocalyptic number.

It is an amenable number.

21463628 is a deficient number, since it is larger than the sum of its proper divisors (16202644).

21463628 is a wasteful number, since it uses less digits than its factorization.

21463628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14992 (or 14990 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 21463628 is about 4632.8854939444. The cubic root of 21463628 is about 277.9079970902.

The spelling of 21463628 in words is "twenty-one million, four hundred sixty-three thousand, six hundred twenty-eight".