21692572 has 12 divisors (see below), whose sum is σ = 41413176. Its totient is φ = 9860240.

The previous prime is 21692569. The next prime is 21692579. The reversal of 21692572 is 27529612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21692579) 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, 246463 + ... + 246550.

It is an arithmetic number, because the mean of its divisors is an integer number (3451098).

Almost surely, 2^21692572 is an apocalyptic number.

21692572 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21692572 is a deficient number, since it is larger than the sum of its proper divisors (19720604).

21692572 is a wasteful number, since it uses less digits than its factorization.

21692572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493028 (or 493026 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 21692572 is about 4657.5285291665. The cubic root of 21692572 is about 278.8926159287.

The spelling of 21692572 in words is "twenty-one million, six hundred ninety-two thousand, five hundred seventy-two".