20743764 has 24 divisors (see below), whose sum is σ = 48948480. Its totient is φ = 6836544.

The previous prime is 20743747. The next prime is 20743771. The reversal of 20743764 is 46734702.

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 7 ways as a sum of consecutive naturals, for example, 8644 + ... + 10779.

It is an arithmetic number, because the mean of its divisors is an integer number (2039520).

Almost surely, 2^20743764 is an apocalyptic number.

It is an amenable number.

20743764 is an abundant number, since it is smaller than the sum of its proper divisors (28204716).

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

20743764 is a wasteful number, since it uses less digits than its factorization.

20743764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19519 (or 19517 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 33.

The square root of 20743764 is about 4554.5322482117. The cubic root of 20743764 is about 274.7657023655.

The spelling of 20743764 in words is "twenty million, seven hundred forty-three thousand, seven hundred sixty-four".