20431203164 has 24 divisors (see below), whose sum is σ = 35995654800. Its totient is φ = 10146779136.

The previous prime is 20431203151. The next prime is 20431203167. The reversal of 20431203164 is 46130213402.

It is a super-2 number, since 2×20431203164² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431203167) 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, 2570204 + ... + 2578140.

It is an arithmetic number, because the mean of its divisors is an integer number (1499818950).

Almost surely, 2^20431203164 is an apocalyptic number.

It is an amenable number.

20431203164 is a deficient number, since it is larger than the sum of its proper divisors (15564451636).

20431203164 is a wasteful number, since it uses less digits than its factorization.

20431203164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12197 (or 12195 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 20431203164 its reverse (46130213402), we get a palindrome (66561416566).

The spelling of 20431203164 in words is "twenty billion, four hundred thirty-one million, two hundred three thousand, one hundred sixty-four".