20388675 has 12 divisors (see below), whose sum is σ = 33709400. Its totient is φ = 10873920.

The previous prime is 20388583. The next prime is 20388727. The reversal of 20388675 is 57688302.

It is not a de Polignac number, because 20388675 - 2⁷ = 20388547 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 135850 + ... + 135999.

Almost surely, 2^20388675 is an apocalyptic number.

20388675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20388675 is a deficient number, since it is larger than the sum of its proper divisors (13320725).

20388675 is a wasteful number, since it uses less digits than its factorization.

20388675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271862 (or 271857 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 20388675 is about 4515.3820436371. The cubic root of 20388675 is about 273.1888695592.

The spelling of 20388675 in words is "twenty million, three hundred eighty-eight thousand, six hundred seventy-five".