20157825 has 12 divisors (see below), whose sum is σ = 33327728. Its totient is φ = 10750800.

The previous prime is 20157817. The next prime is 20157833. The reversal of 20157825 is 52875102.

It is an interprime number because it is at equal distance from previous prime (20157817) and next prime (20157833).

It is not a de Polignac number, because 20157825 - 2³ = 20157817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20157792 and 20157801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134311 + ... + 134460.

Almost surely, 2^20157825 is an apocalyptic number.

20157825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20157825 is a deficient number, since it is larger than the sum of its proper divisors (13169903).

20157825 is a wasteful number, since it uses less digits than its factorization.

20157825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268784 (or 268779 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 20157825 is about 4489.7466520952. The cubic root of 20157825 is about 272.1538966536.

The spelling of 20157825 in words is "twenty million, one hundred fifty-seven thousand, eight hundred twenty-five".