20764886 has 4 divisors (see below), whose sum is σ = 31147332. Its totient is φ = 10382442.

The previous prime is 20764879. The next prime is 20764889. The reversal of 20764886 is 68846702.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20764889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5191220 + ... + 5191223.

It is an arithmetic number, because the mean of its divisors is an integer number (7786833).

Almost surely, 2^20764886 is an apocalyptic number.

20764886 is a deficient number, since it is larger than the sum of its proper divisors (10382446).

20764886 is a wasteful number, since it uses less digits than its factorization.

20764886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10382445.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 20764886 is about 4556.8504474033. The cubic root of 20764886 is about 274.8589292982.

The spelling of 20764886 in words is "twenty million, seven hundred sixty-four thousand, eight hundred eighty-six".