20054661 has 24 divisors (see below), whose sum is σ = 29736672. Its totient is φ = 12012000.

The previous prime is 20054651. The next prime is 20054669. The reversal of 20054661 is 16645002.

It is not a de Polignac number, because 20054661 - 2⁹ = 20054149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20054669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36390 + ... + 36936.

It is an arithmetic number, because the mean of its divisors is an integer number (1239028).

Almost surely, 2^20054661 is an apocalyptic number.

It is an amenable number.

20054661 is a deficient number, since it is larger than the sum of its proper divisors (9682011).

20054661 is a wasteful number, since it uses less digits than its factorization.

20054661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673 (or 662 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20054661 is about 4478.2430706696. The cubic root of 20054661 is about 271.6888246864.

Adding to 20054661 its reverse (16645002), we get a palindrome (36699663).

It can be divided in two parts, 2005 and 4661, that added together give a palindrome (6666).

The spelling of 20054661 in words is "twenty million, fifty-four thousand, six hundred sixty-one".