20900193 has 8 divisors (see below), whose sum is σ = 28515168. Its totient is φ = 13609344.

The previous prime is 20900189. The next prime is 20900221. The reversal of 20900193 is 39100902.

It is a happy number.

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

It is not a de Polignac number, because 20900193 - 2² = 20900189 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20900093) 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, 80880 + ... + 81137.

It is an arithmetic number, because the mean of its divisors is an integer number (3564396).

Almost surely, 2^20900193 is an apocalyptic number.

It is an amenable number.

20900193 is a deficient number, since it is larger than the sum of its proper divisors (7614975).

20900193 is a wasteful number, since it uses less digits than its factorization.

20900193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162063.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 20900193 is about 4571.6728885606. The cubic root of 20900193 is about 275.4546440881.

The spelling of 20900193 in words is "twenty million, nine hundred thousand, one hundred ninety-three".