20053889 has 8 divisors (see below), whose sum is σ = 20668200. Its totient is φ = 19443456.

The previous prime is 20053883. The next prime is 20053927. The reversal of 20053889 is 98835002.

It can be written as a sum of positive squares in 4 ways, for example, as 4804864 + 15249025 = 2192^2 + 3905^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20053889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20053883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12137 + ... + 13689.

It is an arithmetic number, because the mean of its divisors is an integer number (2583525).

Almost surely, 2^20053889 is an apocalyptic number.

It is an amenable number.

20053889 is a deficient number, since it is larger than the sum of its proper divisors (614311).

20053889 is a wasteful number, since it uses less digits than its factorization.

20053889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 20053889 is about 4478.1568753227. The cubic root of 20053889 is about 271.6853384401.

The spelling of 20053889 in words is "twenty million, fifty-three thousand, eight hundred eighty-nine".