21265762 has 16 divisors (see below), whose sum is σ = 36896832. Its totient is φ = 9003600.

The previous prime is 21265747. The next prime is 21265771. The reversal of 21265762 is 26756212.

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, 7989 + ... + 10312.

It is an arithmetic number, because the mean of its divisors is an integer number (2306052).

Almost surely, 2^21265762 is an apocalyptic number.

21265762 is a deficient number, since it is larger than the sum of its proper divisors (15631070).

21265762 is a wasteful number, since it uses less digits than its factorization.

21265762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18393.

The product of its digits is 10080, while the sum is 31.

The square root of 21265762 is about 4611.4815406765. The cubic root of 21265762 is about 277.0513791230.

The spelling of 21265762 in words is "twenty-one million, two hundred sixty-five thousand, seven hundred sixty-two".