20959225 has 24 divisors (see below), whose sum is σ = 29888960. Its totient is φ = 14281920.

The previous prime is 20959163. The next prime is 20959229. The reversal of 20959225 is 52295902.

It is not a de Polignac number, because 20959225 - 2⁷ = 20959097 is a prime.

It is a super-2 number, since 2×20959225² = 878578225201250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20959229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39814 + ... + 40336.

Almost surely, 2^20959225 is an apocalyptic number.

20959225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20959225 is a deficient number, since it is larger than the sum of its proper divisors (8929735).

20959225 is a wasteful number, since it uses less digits than its factorization.

20959225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 20959225 is about 4578.1246160409. The cubic root of 20959225 is about 275.7137382392.

The spelling of 20959225 in words is "twenty million, nine hundred fifty-nine thousand, two hundred twenty-five".