20301664 has 24 divisors (see below), whose sum is σ = 40650120. Its totient is φ = 9977856.

The previous prime is 20301647. The next prime is 20301691. The reversal of 20301664 is 46610302.

It is a super-2 number, since 2×20301664² = 824315122337792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3489 + ... + 7264.

It is an arithmetic number, because the mean of its divisors is an integer number (1693755).

Almost surely, 2^20301664 is an apocalyptic number.

It is an amenable number.

20301664 is an abundant number, since it is smaller than the sum of its proper divisors (20348456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20301664 is a wasteful number, since it uses less digits than its factorization.

20301664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10822 (or 10814 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20301664 is about 4505.7367876963. The cubic root of 20301664 is about 272.7996938447.

Adding to 20301664 its reverse (46610302), we get a palindrome (66911966).

The spelling of 20301664 in words is "twenty million, three hundred one thousand, six hundred sixty-four".