20312443501 has 16 divisors (see below), whose sum is σ = 23762911744. Its totient is φ = 16999449264.

The previous prime is 20312443499. The next prime is 20312443513. The reversal of 20312443501 is 10534421302.

It is not a de Polignac number, because 20312443501 - 2¹ = 20312443499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312443301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 912166 + ... + 934168.

It is an arithmetic number, because the mean of its divisors is an integer number (1485181984).

Almost surely, 2^20312443501 is an apocalyptic number.

It is an amenable number.

20312443501 is a deficient number, since it is larger than the sum of its proper divisors (3450468243).

20312443501 is a wasteful number, since it uses less digits than its factorization.

20312443501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25120.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20312443501 its reverse (10534421302), we get a palindrome (30846864803).

The spelling of 20312443501 in words is "twenty billion, three hundred twelve million, four hundred forty-three thousand, five hundred one".