20431301111 has 4 divisors (see below), whose sum is σ = 22002939672. Its totient is φ = 18859662552.

The previous prime is 20431301089. The next prime is 20431301117. The reversal of 20431301111 is 11110313402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20431301111 - 2⁶ = 20431301047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20431301111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431301117) 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, 785819261 + ... + 785819286.

It is an arithmetic number, because the mean of its divisors is an integer number (5500734918).

Almost surely, 2^20431301111 is an apocalyptic number.

20431301111 is a deficient number, since it is larger than the sum of its proper divisors (1571638561).

20431301111 is a wasteful number, since it uses less digits than its factorization.

20431301111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571638560.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20431301111 its reverse (11110313402), we get a palindrome (31541614513).

The spelling of 20431301111 in words is "twenty billion, four hundred thirty-one million, three hundred one thousand, one hundred eleven".