20964605 has 8 divisors (see below), whose sum is σ = 25188864. Its totient is φ = 16750800.

The previous prime is 20964599. The next prime is 20964611. The reversal of 20964605 is 50646902.

It is an interprime number because it is at equal distance from previous prime (20964599) and next prime (20964611).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20964605 - 2¹⁰ = 20963581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2840 + ... + 7070.

It is an arithmetic number, because the mean of its divisors is an integer number (3148608).

Almost surely, 2^20964605 is an apocalyptic number.

It is an amenable number.

20964605 is a deficient number, since it is larger than the sum of its proper divisors (4224259).

20964605 is an equidigital number, since it uses as much as digits as its factorization.

20964605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5227.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 20964605 is about 4578.7121551808. The cubic root of 20964605 is about 275.7373271046.

The spelling of 20964605 in words is "twenty million, nine hundred sixty-four thousand, six hundred five".