20054861 has 16 divisors (see below), whose sum is σ = 22118400. Its totient is φ = 18111600.

The previous prime is 20054857. The next prime is 20054869. The reversal of 20054861 is 16845002.

It is a cyclic number.

It is not a de Polignac number, because 20054861 - 2² = 20054857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20054861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20054869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46316 + ... + 46746.

It is an arithmetic number, because the mean of its divisors is an integer number (1382400).

Almost surely, 2^20054861 is an apocalyptic number.

It is an amenable number.

20054861 is a deficient number, since it is larger than the sum of its proper divisors (2063539).

20054861 is a wasteful number, since it uses less digits than its factorization.

20054861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 20054861 is about 4478.2654007997. The cubic root of 20054861 is about 271.6897278444.

Adding to 20054861 its reverse (16845002), we get a palindrome (36899863).

The spelling of 20054861 in words is "twenty million, fifty-four thousand, eight hundred sixty-one".