20431368148 has 6 divisors (see below), whose sum is σ = 35754894266. Its totient is φ = 10215684072.

The previous prime is 20431368137. The next prime is 20431368149. The reversal of 20431368148 is 84186313402.

It can be written as a sum of positive squares in only one way, i.e., 13458784144 + 6972584004 = 116012^2 + 83502^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20431368148.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431368149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2553921015 + ... + 2553921022.

Almost surely, 2^20431368148 is an apocalyptic number.

It is an amenable number.

20431368148 is a deficient number, since it is larger than the sum of its proper divisors (15323526118).

20431368148 is a wasteful number, since it uses less digits than its factorization.

20431368148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5107842041 (or 5107842039 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 20431368148 in words is "twenty billion, four hundred thirty-one million, three hundred sixty-eight thousand, one hundred forty-eight".