20613189 has 8 divisors (see below), whose sum is σ = 27606240. Its totient is φ = 13681136.

The previous prime is 20613169. The next prime is 20613193. The reversal of 20613189 is 98131602.

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

It is a cyclic number.

It is not a de Polignac number, because 20613189 - 2¹² = 20609093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20613139) 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, 14454 + ... + 15815.

It is an arithmetic number, because the mean of its divisors is an integer number (3450780).

Almost surely, 2^20613189 is an apocalyptic number.

It is an amenable number.

20613189 is a deficient number, since it is larger than the sum of its proper divisors (6993051).

20613189 is a wasteful number, since it uses less digits than its factorization.

20613189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30499.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 20613189 is about 4540.1749966273. The cubic root of 20613189 is about 274.1879693026.

It can be divided in two parts, 20613 and 189, that added together give a palindrome (20802).

The spelling of 20613189 in words is "twenty million, six hundred thirteen thousand, one hundred eighty-nine".