20164653 has 8 divisors (see below), whose sum is σ = 29873600. Its totient is φ = 13443084.

The previous prime is 20164649. The next prime is 20164733. The reversal of 20164653 is 35646102.

20164653 is a `hidden beast` number, since 2 + 0 + 1 + 6 + 4 + 653 = 666.

It is not a de Polignac number, because 20164653 - 2² = 20164649 is a prime.

It is a super-2 number, since 2×20164653² = 813226461220818, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 746839 = 20164653 / (2 + 0 + 1 + 6 + 4 + 6 + 5 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20164853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373393 + ... + 373446.

It is an arithmetic number, because the mean of its divisors is an integer number (3734200).

Almost surely, 2^20164653 is an apocalyptic number.

It is an amenable number.

20164653 is a deficient number, since it is larger than the sum of its proper divisors (9708947).

20164653 is an equidigital number, since it uses as much as digits as its factorization.

20164653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746848 (or 746842 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20164653 is about 4490.5069869671. The cubic root of 20164653 is about 272.1846218109.

The spelling of 20164653 in words is "twenty million, one hundred sixty-four thousand, six hundred fifty-three".