20113899 has 8 divisors (see below), whose sum is σ = 28881552. Its totient is φ = 12377760.

The previous prime is 20113883. The next prime is 20113927. The reversal of 20113899 is 99831102.

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

It is not a de Polignac number, because 20113899 - 2⁴ = 20113883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20113859) 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, 257832 + ... + 257909.

It is an arithmetic number, because the mean of its divisors is an integer number (3610194).

Almost surely, 2^20113899 is an apocalyptic number.

20113899 is a deficient number, since it is larger than the sum of its proper divisors (8767653).

20113899 is a wasteful number, since it uses less digits than its factorization.

20113899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515757.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 20113899 is about 4484.8521714768. The cubic root of 20113899 is about 271.9560689936.

It can be divided in two parts, 20113 and 899, that added together give a palindrome (21012).

The spelling of 20113899 in words is "twenty million, one hundred thirteen thousand, eight hundred ninety-nine".