20422625 has 16 divisors (see below), whose sum is σ = 26832000. Its totient is φ = 15476400.

The previous prime is 20422613. The next prime is 20422637. The reversal of 20422625 is 52622402.

It is an interprime number because it is at equal distance from previous prime (20422613) and next prime (20422637).

It is not a de Polignac number, because 20422625 - 2⁴ = 20422609 is a prime.

It is a super-2 number, since 2×20422625² = 834167223781250, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20422625.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1925 + ... + 6674.

It is an arithmetic number, because the mean of its divisors is an integer number (1677000).

Almost surely, 2^20422625 is an apocalyptic number.

20422625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20422625 is a deficient number, since it is larger than the sum of its proper divisors (6409375).

20422625 is an equidigital number, since it uses as much as digits as its factorization.

20422625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8633 (or 8623 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20422625 is about 4519.1398517860. The cubic root of 20422625 is about 273.3404180529.

The spelling of 20422625 in words is "twenty million, four hundred twenty-two thousand, six hundred twenty-five".