20275164 has 96 divisors (see below), whose sum is σ = 64727040. Its totient is φ = 5344704.

The previous prime is 20275163. The next prime is 20275181. The reversal of 20275164 is 46157202.

It is a super-2 number, since 2×20275164² = 822164550453792, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20275163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8797 + ... + 10859.

It is an arithmetic number, because the mean of its divisors is an integer number (674240).

Almost surely, 2^20275164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20275164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32363520).

20275164 is an abundant number, since it is smaller than the sum of its proper divisors (44451876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20275164 is a wasteful number, since it uses less digits than its factorization.

20275164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096 (or 2088 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20275164 is about 4502.7951319153. The cubic root of 20275164 is about 272.6809459493.

The spelling of 20275164 in words is "twenty million, two hundred seventy-five thousand, one hundred sixty-four".