20545888 has 24 divisors (see below), whose sum is σ = 44127720. Its totient is φ = 9338880.

The previous prime is 20545883. The next prime is 20545907. The reversal of 20545888 is 88854502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20545888.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545883) 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, 28833 + ... + 29536.

It is an arithmetic number, because the mean of its divisors is an integer number (1838655).

Almost surely, 2^20545888 is an apocalyptic number.

It is an amenable number.

20545888 is an abundant number, since it is smaller than the sum of its proper divisors (23581832).

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

20545888 is a wasteful number, since it uses less digits than its factorization.

20545888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58390 (or 58382 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 40.

The square root of 20545888 is about 4532.7572182944. The cubic root of 20545888 is about 273.8892407577.

The spelling of 20545888 in words is "twenty million, five hundred forty-five thousand, eight hundred eighty-eight".