21273752 has 32 divisors (see below), whose sum is σ = 41428800. Its totient is φ = 10233600.

The previous prime is 21273739. The next prime is 21273761. The reversal of 21273752 is 25737212.

It is a congruent number.

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, 25502 + ... + 26322.

It is an arithmetic number, because the mean of its divisors is an integer number (1294650).

Almost surely, 2^21273752 is an apocalyptic number.

It is an amenable number.

21273752 is a deficient number, since it is larger than the sum of its proper divisors (20155048).

21273752 is a wasteful number, since it uses less digits than its factorization.

21273752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947 (or 943 counting only the distinct ones).

The product of its digits is 5880, while the sum is 29.

The square root of 21273752 is about 4612.3477752659. The cubic root of 21273752 is about 277.0860728142.

The spelling of 21273752 in words is "twenty-one million, two hundred seventy-three thousand, seven hundred fifty-two".