20680675 has 6 divisors (see below), whose sum is σ = 25644068. Its totient is φ = 16544520.

The previous prime is 20680651. The next prime is 20680697. The reversal of 20680675 is 57608602.

It is not a de Polignac number, because 20680675 - 2²³ = 12292067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20680675.

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, 413589 + ... + 413638.

Almost surely, 2^20680675 is an apocalyptic number.

20680675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20680675 is a deficient number, since it is larger than the sum of its proper divisors (4963393).

20680675 is an equidigital number, since it uses as much as digits as its factorization.

20680675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827237 (or 827232 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 20680675 is about 4547.6010159204. The cubic root of 20680675 is about 274.4868668118.

The spelling of 20680675 in words is "twenty million, six hundred eighty thousand, six hundred seventy-five".