20431127388 has 48 divisors (see below), whose sum is σ = 54525304064. Its totient is φ = 5832933120.

The previous prime is 20431127383. The next prime is 20431127389. The reversal of 20431127388 is 88372113402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431127383) 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, 15183 + ... + 202713.

Almost surely, 2^20431127388 is an apocalyptic number.

20431127388 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20431127388 is an abundant number, since it is smaller than the sum of its proper divisors (34094176676).

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

20431127388 is a wasteful number, since it uses less digits than its factorization.

20431127388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188842 (or 188840 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 20431127388 in words is "twenty billion, four hundred thirty-one million, one hundred twenty-seven thousand, three hundred eighty-eight".