20653051 has 4 divisors (see below), whose sum is σ = 20664352. Its totient is φ = 20641752.

The previous prime is 20653007. The next prime is 20653063. The reversal of 20653051 is 15035602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20653051 - 2⁷ = 20652923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20653001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2211 + ... + 6796.

It is an arithmetic number, because the mean of its divisors is an integer number (5166088).

Almost surely, 2^20653051 is an apocalyptic number.

20653051 is a deficient number, since it is larger than the sum of its proper divisors (11301).

20653051 is an equidigital number, since it uses as much as digits as its factorization.

20653051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11300.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 20653051 is about 4544.5627952532. The cubic root of 20653051 is about 274.3645980147.

Adding to 20653051 its reverse (15035602), we get a palindrome (35688653).

The spelling of 20653051 in words is "twenty million, six hundred fifty-three thousand, fifty-one".