20726764 has 24 divisors (see below), whose sum is σ = 37754640. Its totient is φ = 9944256.

The previous prime is 20726753. The next prime is 20726773. The reversal of 20726764 is 46762702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22399 + ... + 23305.

It is an arithmetic number, because the mean of its divisors is an integer number (1573110).

Almost surely, 2^20726764 is an apocalyptic number.

It is an amenable number.

20726764 is a deficient number, since it is larger than the sum of its proper divisors (17027876).

20726764 is a wasteful number, since it uses less digits than its factorization.

20726764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 20726764 is about 4552.6655928148. The cubic root of 20726764 is about 274.6906228778.

It can be divided in two parts, 2072 and 6764, that added together give a square (8836 = 94²).

The spelling of 20726764 in words is "twenty million, seven hundred twenty-six thousand, seven hundred sixty-four".