20431401312 has 192 divisors, whose sum is σ = 65161635840. Its totient is φ = 5471993856.

The previous prime is 20431401311. The next prime is 20431401317. The reversal of 20431401312 is 21310413402.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431401311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2932489 + ... + 2939447.

It is an arithmetic number, because the mean of its divisors is an integer number (339383520).

Almost surely, 2^20431401312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20431401312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32580817920).

20431401312 is an abundant number, since it is smaller than the sum of its proper divisors (44730234528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20431401312 is a wasteful number, since it uses less digits than its factorization.

20431401312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7253 (or 7245 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20431401312 its reverse (21310413402), we get a palindrome (41741814714).

The spelling of 20431401312 in words is "twenty billion, four hundred thirty-one million, four hundred one thousand, three hundred twelve".