20864053 has 12 divisors (see below), whose sum is σ = 24377760. Its totient is φ = 17804472.

The previous prime is 20864047. The next prime is 20864087. The reversal of 20864053 is 35046802.

It is a de Polignac number, because none of the positive numbers 2^k-20864053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20864153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12078 + ... + 13696.

It is an arithmetic number, because the mean of its divisors is an integer number (2031480).

Almost surely, 2^20864053 is an apocalyptic number.

It is an amenable number.

20864053 is a deficient number, since it is larger than the sum of its proper divisors (3513707).

20864053 is a wasteful number, since it uses less digits than its factorization.

20864053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896 (or 1889 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20864053 is about 4567.7185771455. The cubic root of 20864053 is about 275.2957831264.

It can be divided in two parts, 208 and 64053, that added together give a triangular number (64261 = T₃₅₈).

The spelling of 20864053 in words is "twenty million, eight hundred sixty-four thousand, fifty-three".