20538193 has 16 divisors (see below), whose sum is σ = 23587200. Its totient is φ = 17715456.

The previous prime is 20538187. The next prime is 20538211. The reversal of 20538193 is 39183502.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20538193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20538143) 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, 43746 + ... + 44212.

It is an arithmetic number, because the mean of its divisors is an integer number (1474200).

Almost surely, 2^20538193 is an apocalyptic number.

It is an amenable number.

20538193 is a deficient number, since it is larger than the sum of its proper divisors (3049007).

20538193 is a wasteful number, since it uses less digits than its factorization.

20538193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 20538193 is about 4531.9083176958. The cubic root of 20538193 is about 273.8550434709.

The spelling of 20538193 in words is "twenty million, five hundred thirty-eight thousand, one hundred ninety-three".