21292652 has 12 divisors (see below), whose sum is σ = 37314480. Its totient is φ = 10631376.

The previous prime is 21292639. The next prime is 21292657. The reversal of 21292652 is 25629212.

It is not an unprimeable number, because it can be changed into a prime (21292657) 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, 152 + ... + 6527.

It is an arithmetic number, because the mean of its divisors is an integer number (3109540).

Almost surely, 2^21292652 is an apocalyptic number.

It is an amenable number.

21292652 is a deficient number, since it is larger than the sum of its proper divisors (16021828).

21292652 is a wasteful number, since it uses less digits than its factorization.

21292652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7480 (or 7478 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 21292652 is about 4614.3961685144. The cubic root of 21292652 is about 277.1681046795.

The spelling of 21292652 in words is "twenty-one million, two hundred ninety-two thousand, six hundred fifty-two".