20725875 has 80 divisors (see below), whose sum is σ = 40772160. Its totient is φ = 10454400.

The previous prime is 20725867. The next prime is 20725889. The reversal of 20725875 is 57852702.

20725875 is a `hidden beast` number, since 2 + 0 + 72 + 587 + 5 = 666.

It is not a de Polignac number, because 20725875 - 2³ = 20725867 is a prime.

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 79 ways as a sum of consecutive naturals, for example, 232831 + ... + 232919.

It is an arithmetic number, because the mean of its divisors is an integer number (509652).

Almost surely, 2^20725875 is an apocalyptic number.

20725875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20725875 is a deficient number, since it is larger than the sum of its proper divisors (20046285).

20725875 is an equidigital number, since it uses as much as digits as its factorization.

20725875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 20725875 is about 4552.5679566592. The cubic root of 20725875 is about 274.6866955328.

The spelling of 20725875 in words is "twenty million, seven hundred twenty-five thousand, eight hundred seventy-five".