21426652 has 12 divisors (see below), whose sum is σ = 40381096. Its totient is φ = 9889200.

The previous prime is 21426649. The next prime is 21426653. The reversal of 21426652 is 25662412.

It is a self number, because there is not a number n which added to its sum of digits gives 21426652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21426653) 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, 205974 + ... + 206077.

Almost surely, 2^21426652 is an apocalyptic number.

It is an amenable number.

21426652 is a deficient number, since it is larger than the sum of its proper divisors (18954444).

21426652 is a wasteful number, since it uses less digits than its factorization.

21426652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412068 (or 412066 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 21426652 is about 4628.8931722389. The cubic root of 21426652 is about 277.7483187011.

The spelling of 21426652 in words is "twenty-one million, four hundred twenty-six thousand, six hundred fifty-two".