20153189 has 4 divisors (see below), whose sum is σ = 23032224. Its totient is φ = 17274156.

The previous prime is 20153153. The next prime is 20153191. The reversal of 20153189 is 98135102.

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 not a de Polignac number, because 20153189 - 2¹⁶ = 20087653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20153389) 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, 1439507 + ... + 1439520.

It is an arithmetic number, because the mean of its divisors is an integer number (5758056).

Almost surely, 2^20153189 is an apocalyptic number.

It is an amenable number.

20153189 is a deficient number, since it is larger than the sum of its proper divisors (2879035).

20153189 is an equidigital number, since it uses as much as digits as its factorization.

20153189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2879034.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 20153189 is about 4489.2303349238. The cubic root of 20153189 is about 272.1330312709.

The spelling of 20153189 in words is "twenty million, one hundred fifty-three thousand, one hundred eighty-nine".