20922925 has 6 divisors (see below), whose sum is σ = 25944458. Its totient is φ = 16738320.

The previous prime is 20922911. The next prime is 20922931. The reversal of 20922925 is 52922902.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6687396 + 14235529 = 2586^2 + 3773^2 .

It is not a de Polignac number, because 20922925 - 2⁹ = 20922413 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 5 ways as a sum of consecutive naturals, for example, 418434 + ... + 418483.

Almost surely, 2^20922925 is an apocalyptic number.

20922925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20922925 is a deficient number, since it is larger than the sum of its proper divisors (5021533).

20922925 is an equidigital number, since it uses as much as digits as its factorization.

20922925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836927 (or 836922 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 20922925 is about 4574.1583925352. The cubic root of 20922925 is about 275.5544735681.

The spelling of 20922925 in words is "twenty million, nine hundred twenty-two thousand, nine hundred twenty-five".