20164553 has 4 divisors (see below), whose sum is σ = 20233668. Its totient is φ = 20095440.

The previous prime is 20164531. The next prime is 20164559. The reversal of 20164553 is 35546102.

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 7795264 + 12369289 = 2792^2 + 3517^2 .

It is a cyclic number.

It is not a de Polignac number, because 20164553 - 2¹⁰ = 20163529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20164559) 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, 34118 + ... + 34703.

It is an arithmetic number, because the mean of its divisors is an integer number (5058417).

Almost surely, 2^20164553 is an apocalyptic number.

It is an amenable number.

20164553 is a deficient number, since it is larger than the sum of its proper divisors (69115).

20164553 is an equidigital number, since it uses as much as digits as its factorization.

20164553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69114.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 20164553 is about 4490.4958523531. The cubic root of 20164553 is about 272.1841718733.

The spelling of 20164553 in words is "twenty million, one hundred sixty-four thousand, five hundred fifty-three".