20431504334 has 16 divisors (see below), whose sum is σ = 31909426416. Its totient is φ = 9803198400.

The previous prime is 20431504321. The next prime is 20431504339. The reversal of 20431504334 is 43340513402.

It is a junction number, because it is equal to n+sod(n) for n = 20431504297 and 20431504306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431504339) 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, 2037332 + ... + 2047335.

It is an arithmetic number, because the mean of its divisors is an integer number (1994339151).

Almost surely, 2^20431504334 is an apocalyptic number.

20431504334 is a deficient number, since it is larger than the sum of its proper divisors (11477922082).

20431504334 is a wasteful number, since it uses less digits than its factorization.

20431504334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4084771.

The product of its (nonzero) digits is 17280, while the sum is 29.

The spelling of 20431504334 in words is "twenty billion, four hundred thirty-one million, five hundred four thousand, three hundred thirty-four".