20541818 has 16 divisors (see below), whose sum is σ = 33915456. Its totient is φ = 9253440.

The previous prime is 20541799. The next prime is 20541821. The reversal of 20541818 is 81814502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1646 + ... + 6617.

It is an arithmetic number, because the mean of its divisors is an integer number (2119716).

Almost surely, 2^20541818 is an apocalyptic number.

20541818 is a deficient number, since it is larger than the sum of its proper divisors (13373638).

20541818 is a wasteful number, since it uses less digits than its factorization.

20541818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8389.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 20541818 is about 4532.3082419447. The cubic root of 20541818 is about 273.8711543678.

The spelling of 20541818 in words is "twenty million, five hundred forty-one thousand, eight hundred eighteen".