20389675 has 6 divisors (see below), whose sum is σ = 25283228. Its totient is φ = 16311720.

The previous prime is 20389667. The next prime is 20389727. The reversal of 20389675 is 57698302.

It is not a de Polignac number, because 20389675 - 2³ = 20389667 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 407769 + ... + 407818.

Almost surely, 2^20389675 is an apocalyptic number.

20389675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20389675 is a deficient number, since it is larger than the sum of its proper divisors (4893553).

20389675 is an equidigital number, since it uses as much as digits as its factorization.

20389675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815597 (or 815592 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 20389675 is about 4515.4927748807. The cubic root of 20389675 is about 273.1933358361.

The spelling of 20389675 in words is "twenty million, three hundred eighty-nine thousand, six hundred seventy-five".