20431127408 has 20 divisors (see below), whose sum is σ = 41913857520. Its totient is φ = 9614648064.

The previous prime is 20431127399. The next prime is 20431127411. The reversal of 20431127408 is 80472113402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37556948 + ... + 37557491.

It is an arithmetic number, because the mean of its divisors is an integer number (2095692876).

Almost surely, 2^20431127408 is an apocalyptic number.

It is an amenable number.

20431127408 is an abundant number, since it is smaller than the sum of its proper divisors (21482730112).

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

20431127408 is a wasteful number, since it uses less digits than its factorization.

20431127408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75114464 (or 75114458 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The spelling of 20431127408 in words is "twenty billion, four hundred thirty-one million, one hundred twenty-seven thousand, four hundred eight".