20111300431 has 4 divisors (see below), whose sum is σ = 20113664200. Its totient is φ = 20108936664.

The previous prime is 20111300413. The next prime is 20111300467. The reversal of 20111300431 is 13400311102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13400311102 = 2 ⋅6700155551.

It is a cyclic number.

It is not a de Polignac number, because 20111300431 - 2⁹ = 20111299919 is a prime.

It is a super-2 number, since 2×20111300431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111300401) 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, 1169076 + ... + 1186153.

It is an arithmetic number, because the mean of its divisors is an integer number (5028416050).

Almost surely, 2^20111300431 is an apocalyptic number.

20111300431 is a deficient number, since it is larger than the sum of its proper divisors (2363769).

20111300431 is an equidigital number, since it uses as much as digits as its factorization.

20111300431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363768.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20111300431 its reverse (13400311102), we get a palindrome (33511611533).

The spelling of 20111300431 in words is "twenty billion, one hundred eleven million, three hundred thousand, four hundred thirty-one".