20653057 has 16 divisors (see below), whose sum is σ = 22901760. Its totient is φ = 18537552.

The previous prime is 20653007. The next prime is 20653063. The reversal of 20653057 is 75035602.

It is a cyclic number.

It is not a de Polignac number, because 20653057 - 2¹⁵ = 20620289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20653007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72838 + ... + 73120.

It is an arithmetic number, because the mean of its divisors is an integer number (1431360).

Almost surely, 2^20653057 is an apocalyptic number.

It is an amenable number.

20653057 is a deficient number, since it is larger than the sum of its proper divisors (2248703).

20653057 is a wasteful number, since it uses less digits than its factorization.

20653057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 20653057 is about 4544.5634553827. The cubic root of 20653057 is about 274.3646245837.

Adding to 20653057 its reverse (75035602), we get a palindrome (95688659).

The spelling of 20653057 in words is "twenty million, six hundred fifty-three thousand, fifty-seven".