27431972640220 has 24 divisors (see below), whose sum is σ = 59012194803408. Its totient is φ = 10705160054400.

The previous prime is 27431972640181. The next prime is 27431972640229. The reversal of 27431972640220 is 2204627913472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27431972640229) 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, 16726811766 + ... + 16726813405.

It is an arithmetic number, because the mean of its divisors is an integer number (2458841450142).

Almost surely, 2^{27431972640220} is an apocalyptic number.

27431972640220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27431972640220 is an abundant number, since it is smaller than the sum of its proper divisors (31580222163188).

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

27431972640220 is a wasteful number, since it uses less digits than its factorization.

27431972640220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33453625221 (or 33453625219 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 27431972640220 in words is "twenty-seven trillion, four hundred thirty-one billion, nine hundred seventy-two million, six hundred forty thousand, two hundred twenty".