20188973 has 8 divisors (see below), whose sum is σ = 23610048. Its totient is φ = 16902144.

The previous prime is 20188957. The next prime is 20188981. The reversal of 20188973 is 37988102.

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

It is not a de Polignac number, because 20188973 - 2⁴ = 20188957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20188943) 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, 33236 + ... + 33837.

It is an arithmetic number, because the mean of its divisors is an integer number (2951256).

Almost surely, 2^20188973 is an apocalyptic number.

It is an amenable number.

20188973 is a deficient number, since it is larger than the sum of its proper divisors (3421075).

20188973 is an equidigital number, since it uses as much as digits as its factorization.

20188973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67123.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 20188973 is about 4493.2141057377. The cubic root of 20188973 is about 272.2940024943.

The spelling of 20188973 in words is "twenty million, one hundred eighty-eight thousand, nine hundred seventy-three".