20774631 has 8 divisors (see below), whose sum is σ = 27765504. Its totient is φ = 13816760.

The previous prime is 20774627. The next prime is 20774639. The reversal of 20774631 is 13647702.

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

It is a cyclic number.

It is not a de Polignac number, because 20774631 - 2² = 20774627 is a prime.

It is a super-2 number, since 2×20774631² = 863170586372322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20774639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6741 + ... + 9326.

It is an arithmetic number, because the mean of its divisors is an integer number (3470688).

Almost surely, 2^20774631 is an apocalyptic number.

20774631 is a deficient number, since it is larger than the sum of its proper divisors (6990873).

20774631 is a wasteful number, since it uses less digits than its factorization.

20774631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16501.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 20774631 is about 4557.9195912170. The cubic root of 20774631 is about 274.9019198443.

The spelling of 20774631 in words is "twenty million, seven hundred seventy-four thousand, six hundred thirty-one".