20764929 has 32 divisors (see below), whose sum is σ = 31150080. Its totient is φ = 12241152.

The previous prime is 20764927. The next prime is 20764937. The reversal of 20764929 is 92946702.

It is not a de Polignac number, because 20764929 - 2¹ = 20764927 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20764921) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 61449 + ... + 61785.

It is an arithmetic number, because the mean of its divisors is an integer number (973440).

Almost surely, 2^20764929 is an apocalyptic number.

It is an amenable number.

20764929 is a deficient number, since it is larger than the sum of its proper divisors (10385151).

20764929 is a wasteful number, since it uses less digits than its factorization.

20764929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 20764929 is about 4556.8551655720. The cubic root of 20764929 is about 274.8591190244.

The spelling of 20764929 in words is "twenty million, seven hundred sixty-four thousand, nine hundred twenty-nine".