19551977832 has 32 divisors (see below), whose sum is σ = 48928258080. Its totient is φ = 6510884160.

The previous prime is 19551977813. The next prime is 19551977867. The reversal of 19551977832 is 23877915591.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377794 + ... + 426417.

It is an arithmetic number, because the mean of its divisors is an integer number (1529008065).

Almost surely, 2^19551977832 is an apocalyptic number.

19551977832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19551977832 is an abundant number, since it is smaller than the sum of its proper divisors (29376280248).

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

19551977832 is a wasteful number, since it uses less digits than its factorization.

19551977832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805233 (or 805229 counting only the distinct ones).

The product of its digits is 4762800, while the sum is 57.

The spelling of 19551977832 in words is "nineteen billion, five hundred fifty-one million, nine hundred seventy-seven thousand, eight hundred thirty-two".