19939791375 has 96 divisors (see below), whose sum is σ = 42082395264. Its totient is φ = 8892864000.

The previous prime is 19939791359. The next prime is 19939791401. The reversal of 19939791375 is 57319793991.

19939791375 is a `hidden beast` number, since 1 + 9 + 93 + 97 + 91 + 375 = 666.

It is not a de Polignac number, because 19939791375 - 2⁴ = 19939791359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 291997 + ... + 353753.

It is an arithmetic number, because the mean of its divisors is an integer number (438358284).

Almost surely, 2^19939791375 is an apocalyptic number.

19939791375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19939791375 is an abundant number, since it is smaller than the sum of its proper divisors (22142603889).

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

19939791375 is a wasteful number, since it uses less digits than its factorization.

19939791375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61826 (or 61813 counting only the distinct ones).

The product of its digits is 14467005, while the sum is 63.

The spelling of 19939791375 in words is "nineteen billion, nine hundred thirty-nine million, seven hundred ninety-one thousand, three hundred seventy-five".