20431457111 has 4 divisors (see below), whose sum is σ = 22003107672. Its totient is φ = 18859806552.

The previous prime is 20431457063. The next prime is 20431457119. The reversal of 20431457111 is 11175413402.

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 20431457111 - 2⁶ = 20431457047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431457119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785825261 + ... + 785825286.

It is an arithmetic number, because the mean of its divisors is an integer number (5500776918).

Almost surely, 2^20431457111 is an apocalyptic number.

20431457111 is a deficient number, since it is larger than the sum of its proper divisors (1571650561).

20431457111 is a wasteful number, since it uses less digits than its factorization.

20431457111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571650560.

The product of its (nonzero) digits is 3360, while the sum is 29.

The spelling of 20431457111 in words is "twenty billion, four hundred thirty-one million, four hundred fifty-seven thousand, one hundred eleven".