20012889 has 16 divisors (see below), whose sum is σ = 28817600. Its totient is φ = 12280896.

The previous prime is 20012873. The next prime is 20012903. The reversal of 20012889 is 98821002.

It is not a de Polignac number, because 20012889 - 2⁴ = 20012873 is a prime.

It is a super-2 number, since 2×20012889² = 801031452252642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012189) 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, 23727 + ... + 24555.

It is an arithmetic number, because the mean of its divisors is an integer number (1801100).

Almost surely, 2^20012889 is an apocalyptic number.

It is an amenable number.

20012889 is a deficient number, since it is larger than the sum of its proper divisors (8804711).

20012889 is a wasteful number, since it uses less digits than its factorization.

20012889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 20012889 is about 4473.5767569139. The cubic root of 20012889 is about 271.5000593524.

The spelling of 20012889 in words is "twenty million, twelve thousand, eight hundred eighty-nine".