19923189 has 16 divisors (see below), whose sum is σ = 31209024. Its totient is φ = 11145600.

The previous prime is 19923161. The next prime is 19923193. The reversal of 19923189 is 98132991.

It is not a de Polignac number, because 19923189 - 2⁵ = 19923157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19923189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19923119) 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, 22792 + ... + 23649.

It is an arithmetic number, because the mean of its divisors is an integer number (1950564).

Almost surely, 2^19923189 is an apocalyptic number.

It is an amenable number.

19923189 is a deficient number, since it is larger than the sum of its proper divisors (11285835).

19923189 is a wasteful number, since it uses less digits than its factorization.

19923189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46468.

The product of its digits is 34992, while the sum is 42.

The square root of 19923189 is about 4463.5399628546. The cubic root of 19923189 is about 271.0938206311.

The spelling of 19923189 in words is "nineteen million, nine hundred twenty-three thousand, one hundred eighty-nine".