21373461 has 12 divisors (see below), whose sum is σ = 32497920. Its totient is φ = 13498920.

The previous prime is 21373447. The next prime is 21373487. The reversal of 21373461 is 16437312.

It is not a de Polignac number, because 21373461 - 2⁶ = 21373397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21373411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62325 + ... + 62666.

It is an arithmetic number, because the mean of its divisors is an integer number (2708160).

Almost surely, 2^21373461 is an apocalyptic number.

It is an amenable number.

21373461 is a deficient number, since it is larger than the sum of its proper divisors (11124459).

21373461 is a wasteful number, since it uses less digits than its factorization.

21373461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125016 (or 125013 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 21373461 is about 4623.1440600526. The cubic root of 21373461 is about 277.5182943868.

The spelling of 21373461 in words is "twenty-one million, three hundred seventy-three thousand, four hundred sixty-one".