20113357 has 4 divisors (see below), whose sum is σ = 21941856. Its totient is φ = 18284860.

The previous prime is 20113337. The next prime is 20113367. The reversal of 20113357 is 75331102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20113357 - 2¹⁵ = 20080589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914233 + ... + 914254.

It is an arithmetic number, because the mean of its divisors is an integer number (5485464).

Almost surely, 2^20113357 is an apocalyptic number.

It is an amenable number.

20113357 is a deficient number, since it is larger than the sum of its proper divisors (1828499).

20113357 is a wasteful number, since it uses less digits than its factorization.

20113357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828498.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 20113357 is about 4484.7917454437. The cubic root of 20113357 is about 271.9536262132.

Adding to 20113357 its reverse (75331102), we get a palindrome (95444459).

The spelling of 20113357 in words is "twenty million, one hundred thirteen thousand, three hundred fifty-seven".