21736325 has 24 divisors (see below), whose sum is σ = 29664768. Its totient is φ = 15698880.

The previous prime is 21736303. The next prime is 21736339. The reversal of 21736325 is 52363712.

21736325 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 21736325 - 2¹² = 21732229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14564 + ... + 15986.

It is an arithmetic number, because the mean of its divisors is an integer number (1236032).

Almost surely, 2^21736325 is an apocalyptic number.

21736325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21736325 is a deficient number, since it is larger than the sum of its proper divisors (7928443).

21736325 is a wasteful number, since it uses less digits than its factorization.

21736325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493 (or 1488 counting only the distinct ones).

The product of its digits is 7560, while the sum is 29.

The square root of 21736325 is about 4662.2231821310. The cubic root of 21736325 is about 279.0799948758.

The spelling of 21736325 in words is "twenty-one million, seven hundred thirty-six thousand, three hundred twenty-five".