20212764 has 48 divisors (see below), whose sum is σ = 55413120. Its totient is φ = 5653440.

The previous prime is 20212747. The next prime is 20212771. The reversal of 20212764 is 46721202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4174 + ... + 7605.

It is an arithmetic number, because the mean of its divisors is an integer number (1154440).

Almost surely, 2^20212764 is an apocalyptic number.

It is an amenable number.

20212764 is an abundant number, since it is smaller than the sum of its proper divisors (35200356).

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

20212764 is a wasteful number, since it uses less digits than its factorization.

20212764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11810 (or 11808 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20212764 is about 4495.8607629685. The cubic root of 20212764 is about 272.4009190048.

Adding to 20212764 its reverse (46721202), we get a palindrome (66933966).

The spelling of 20212764 in words is "twenty million, two hundred twelve thousand, seven hundred sixty-four".