20864674 has 8 divisors (see below), whose sum is σ = 32306688. Its totient is φ = 10095780.

The previous prime is 20864653. The next prime is 20864677. The reversal of 20864674 is 47646802.

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

It is a super-2 number, since 2×20864674² = 870669242252552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20864677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168202 + ... + 168325.

It is an arithmetic number, because the mean of its divisors is an integer number (4038336).

Almost surely, 2^20864674 is an apocalyptic number.

20864674 is a deficient number, since it is larger than the sum of its proper divisors (11442014).

20864674 is a wasteful number, since it uses less digits than its factorization.

20864674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336560.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 20864674 is about 4567.7865536822. The cubic root of 20864674 is about 275.2985144108.

The spelling of 20864674 in words is "twenty million, eight hundred sixty-four thousand, six hundred seventy-four".