21625933 has 8 divisors (see below), whose sum is σ = 26016320. Its totient is φ = 17560800.

The previous prime is 21625913. The next prime is 21625939. The reversal of 21625933 is 33952612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21625933 - 2¹⁷ = 21494861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21625895 and 21625904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21625939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81168 + ... + 81433.

It is an arithmetic number, because the mean of its divisors is an integer number (3252040).

Almost surely, 2^21625933 is an apocalyptic number.

It is an amenable number.

21625933 is a deficient number, since it is larger than the sum of its proper divisors (4390387).

21625933 is a wasteful number, since it uses less digits than its factorization.

21625933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162627.

The product of its digits is 9720, while the sum is 31.

The square root of 21625933 is about 4650.3691251340. The cubic root of 21625933 is about 278.6067394455.

The spelling of 21625933 in words is "twenty-one million, six hundred twenty-five thousand, nine hundred thirty-three".