20475288 has 32 divisors (see below), whose sum is σ = 56876400. Its totient is φ = 6825024.

The previous prime is 20475281. The next prime is 20475289. The reversal of 20475288 is 88257402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20475281) 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, 47181 + ... + 47612.

Almost surely, 2^20475288 is an apocalyptic number.

It is an amenable number.

20475288 is an abundant number, since it is smaller than the sum of its proper divisors (36401112).

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

20475288 is a wasteful number, since it uses less digits than its factorization.

20475288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94808 (or 94798 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 20475288 is about 4524.9627622777. The cubic root of 20475288 is about 273.5751670290.

The spelling of 20475288 in words is "twenty million, four hundred seventy-five thousand, two hundred eighty-eight".