20542884 has 24 divisors (see below), whose sum is σ = 48117888. Its totient is φ = 6821280.

The previous prime is 20542883. The next prime is 20542889. The reversal of 20542884 is 48824502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20542883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94 + ... + 6410.

It is an arithmetic number, because the mean of its divisors is an integer number (2004912).

Almost surely, 2^20542884 is an apocalyptic number.

It is an amenable number.

20542884 is an abundant number, since it is smaller than the sum of its proper divisors (27575004).

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

20542884 is a wasteful number, since it uses less digits than its factorization.

20542884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6595 (or 6593 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 20542884 is about 4532.4258405406. The cubic root of 20542884 is about 273.8758917220.

The spelling of 20542884 in words is "twenty million, five hundred forty-two thousand, eight hundred eighty-four".