20764475 has 6 divisors (see below), whose sum is σ = 25747980. Its totient is φ = 16611560.

The previous prime is 20764427. The next prime is 20764487. The reversal of 20764475 is 57446702.

It is not a de Polignac number, because 20764475 - 2¹² = 20760379 is a prime.

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, 415265 + ... + 415314.

It is an arithmetic number, because the mean of its divisors is an integer number (4291330).

Almost surely, 2^20764475 is an apocalyptic number.

20764475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20764475 is a deficient number, since it is larger than the sum of its proper divisors (4983505).

20764475 is an equidigital number, since it uses as much as digits as its factorization.

20764475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830589 (or 830584 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 20764475 is about 4556.8053502426. The cubic root of 20764475 is about 274.8571158559.

The spelling of 20764475 in words is "twenty million, seven hundred sixty-four thousand, four hundred seventy-five".