20012431010321 has 4 divisors (see below), whose sum is σ = 20025202186752. Its totient is φ = 19999659833892.

The previous prime is 20012431010311. The next prime is 20012431010413. The reversal of 20012431010321 is 12301013421002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012431010321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012431010293 and 20012431010302.

It is not an unprimeable number, because it can be changed into a prime (20012431010311) 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, 6385585865 + ... + 6385588998.

It is an arithmetic number, because the mean of its divisors is an integer number (5006300546688).

Almost surely, 2^{20012431010321} is an apocalyptic number.

It is an amenable number.

20012431010321 is a deficient number, since it is larger than the sum of its proper divisors (12771176431).

20012431010321 is a wasteful number, since it uses less digits than its factorization.

20012431010321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12771176430.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20012431010321 its reverse (12301013421002), we get a palindrome (32313444431323).

The spelling of 20012431010321 in words is "twenty trillion, twelve billion, four hundred thirty-one million, ten thousand, three hundred twenty-one".