20214234431 has 4 divisors (see below), whose sum is σ = 20222698200. Its totient is φ = 20205770664.

The previous prime is 20214234413. The next prime is 20214234451. The reversal of 20214234431 is 13443241202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20214234431 is a prime.

It is a super-2 number, since 2×20214234431² (a number of 21 digits) contains 22 as substring.

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 20214234431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20214234401) 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, 4228301 + ... + 4233078.

It is an arithmetic number, because the mean of its divisors is an integer number (5055674550).

Almost surely, 2^20214234431 is an apocalyptic number.

20214234431 is a deficient number, since it is larger than the sum of its proper divisors (8463769).

20214234431 is an equidigital number, since it uses as much as digits as its factorization.

20214234431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8463768.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 20214234431 its reverse (13443241202), we get a palindrome (33657475633).

The spelling of 20214234431 in words is "twenty billion, two hundred fourteen million, two hundred thirty-four thousand, four hundred thirty-one".