20675975 has 6 divisors (see below), whose sum is σ = 25638240. Its totient is φ = 16540760.

The previous prime is 20675969. The next prime is 20675983. The reversal of 20675975 is 57957602.

It is not a de Polignac number, because 20675975 - 2⁸ = 20675719 is a prime.

It is a congruent 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, 413495 + ... + 413544.

It is an arithmetic number, because the mean of its divisors is an integer number (4273040).

Almost surely, 2^20675975 is an apocalyptic number.

20675975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20675975 is a deficient number, since it is larger than the sum of its proper divisors (4962265).

20675975 is an equidigital number, since it uses as much as digits as its factorization.

20675975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827049 (or 827044 counting only the distinct ones).

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 20675975 is about 4547.0842305812. The cubic root of 20675975 is about 274.4660714555.

It can be divided in two parts, 2067597 and 5, that added together give a palindrome (2067602).

The spelling of 20675975 in words is "twenty million, six hundred seventy-five thousand, nine hundred seventy-five".