20013089 has 4 divisors (see below), whose sum is σ = 20050224. Its totient is φ = 19975956.

The previous prime is 20013083. The next prime is 20013107. The reversal of 20013089 is 98031002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013089 is a prime.

It is a super-4 number, since 4×20013089⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20013083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17747 + ... + 18840.

It is an arithmetic number, because the mean of its divisors is an integer number (5012556).

Almost surely, 2^20013089 is an apocalyptic number.

It is an amenable number.

20013089 is a deficient number, since it is larger than the sum of its proper divisors (37135).

20013089 is an equidigital number, since it uses as much as digits as its factorization.

20013089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37134.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20013089 is about 4473.5991103361. The cubic root of 20013089 is about 271.5009637667.

The spelling of 20013089 in words is "twenty million, thirteen thousand, eighty-nine".