20655113 has 4 divisors (see below), whose sum is σ = 20745540. Its totient is φ = 20564688.

The previous prime is 20655101. The next prime is 20655143. The reversal of 20655113 is 31155602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16024009 + 4631104 = 4003^2 + 2152^2 .

It is a cyclic number.

It is not a de Polignac number, because 20655113 - 2⁶ = 20655049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20655143) 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 3 ways as a sum of consecutive naturals, for example, 44870 + ... + 45327.

It is an arithmetic number, because the mean of its divisors is an integer number (5186385).

Almost surely, 2^20655113 is an apocalyptic number.

It is an amenable number.

20655113 is a deficient number, since it is larger than the sum of its proper divisors (90427).

20655113 is an equidigital number, since it uses as much as digits as its factorization.

20655113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90426.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 20655113 is about 4544.7896540984. The cubic root of 20655113 is about 274.3737285620.

The spelling of 20655113 in words is "twenty million, six hundred fifty-five thousand, one hundred thirteen".