21927625 has 32 divisors (see below), whose sum is σ = 29652480. Its totient is φ = 16139200.

The previous prime is 21927613. The next prime is 21927629. The reversal of 21927625 is 52672912.

It is not a de Polignac number, because 21927625 - 2¹¹ = 21925577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21927629) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 83244 + ... + 83506.

It is an arithmetic number, because the mean of its divisors is an integer number (926640).

Almost surely, 2^21927625 is an apocalyptic number.

21927625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21927625 is a deficient number, since it is larger than the sum of its proper divisors (7724855).

21927625 is a wasteful number, since it uses less digits than its factorization.

21927625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 320 counting only the distinct ones).

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

The square root of 21927625 is about 4682.6942031271. The cubic root of 21927625 is about 279.8963264142.

The spelling of 21927625 in words is "twenty-one million, nine hundred twenty-seven thousand, six hundred twenty-five".