20796975 has 18 divisors (see below), whose sum is σ = 37250096. Its totient is φ = 11091600.

The previous prime is 20796959. The next prime is 20797013. The reversal of 20796975 is 57969702.

It is not a de Polignac number, because 20796975 - 2⁴ = 20796959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 20796975.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 45991 + ... + 46440.

Almost surely, 2^20796975 is an apocalyptic number.

20796975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20796975 is a deficient number, since it is larger than the sum of its proper divisors (16453121).

20796975 is a wasteful number, since it uses less digits than its factorization.

20796975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92447 (or 92439 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 20796975 is about 4560.3700507744. The cubic root of 20796975 is about 275.0004407706. Note that the first 3 decimals are identical.

It can be divided in two parts, 2079697 and 5, that added together give a palindrome (2079702).

The spelling of 20796975 in words is "twenty million, seven hundred ninety-six thousand, nine hundred seventy-five".