20764953 has 24 divisors (see below), whose sum is σ = 32980896. Its totient is φ = 12484800.

The previous prime is 20764951. The next prime is 20764963. The reversal of 20764953 is 35946702.

20764953 is a `hidden beast` number, since 2 + 0 + 7 + 649 + 5 + 3 = 666.

It is not a de Polignac number, because 20764953 - 2¹ = 20764951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20764951) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 12798 + ... + 14328.

It is an arithmetic number, because the mean of its divisors is an integer number (1374204).

Almost surely, 2^20764953 is an apocalyptic number.

It is an amenable number.

20764953 is a deficient number, since it is larger than the sum of its proper divisors (12215943).

20764953 is a wasteful number, since it uses less digits than its factorization.

20764953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685 (or 1682 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 20764953 is about 4556.8577989663. The cubic root of 20764953 is about 274.8592249179.

It can be divided in two parts, 207649 and 53, that added together give a palindrome (207702).

The spelling of 20764953 in words is "twenty million, seven hundred sixty-four thousand, nine hundred fifty-three".