20548818 has 24 divisors (see below), whose sum is σ = 47142108. Its totient is φ = 6446592.

The previous prime is 20548817. The next prime is 20548819. The reversal of 20548818 is 81884502.

It is an interprime number because it is at equal distance from previous prime (20548817) and next prime (20548819).

It can be written as a sum of positive squares in 2 ways, for example, as 20548089 + 729 = 4533^2 + 27^2 .

It is not an unprimeable number, because it can be changed into a prime (20548813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33271 + ... + 33882.

Almost surely, 2^20548818 is an apocalyptic number.

20548818 is an abundant number, since it is smaller than the sum of its proper divisors (26593290).

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

20548818 is a wasteful number, since it uses less digits than its factorization.

20548818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67178 (or 67175 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 20548818 is about 4533.0804096111. The cubic root of 20548818 is about 273.9022597023.

The spelling of 20548818 in words is "twenty million, five hundred forty-eight thousand, eight hundred eighteen".