20486975 has 12 divisors (see below), whose sum is σ = 25470840. Its totient is φ = 16346400.

The previous prime is 20486957. The next prime is 20487029. The reversal of 20486975 is 57968402.

It is not a de Polignac number, because 20486975 - 2¹² = 20482879 is a prime.

It is a super-2 number, since 2×20486975² = 839432289301250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11441 + ... + 13109.

It is an arithmetic number, because the mean of its divisors is an integer number (2122570).

Almost surely, 2^20486975 is an apocalyptic number.

20486975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20486975 is a deficient number, since it is larger than the sum of its proper divisors (4983865).

20486975 is a wasteful number, since it uses less digits than its factorization.

20486975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170 (or 2165 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 20486975 is about 4526.2539698961. The cubic root of 20486975 is about 273.6272080528.

The spelling of 20486975 in words is "twenty million, four hundred eighty-six thousand, nine hundred seventy-five".