19338780231 has 6 divisors (see below), whose sum is σ = 27933793680. Its totient is φ = 12892520148.

The previous prime is 19338780211. The next prime is 19338780233. The reversal of 19338780231 is 13208783391.

It is a happy number.

19338780231 is a `hidden beast` number, since 1 + 9 + 338 + 7 + 80 + 231 = 666.

It is not a de Polignac number, because 19338780231 - 2²² = 19334585927 is a prime.

It is a super-2 number, since 2×19338780231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19338780233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1074376671 + ... + 1074376688.

It is an arithmetic number, because the mean of its divisors is an integer number (4655632280).

Almost surely, 2^19338780231 is an apocalyptic number.

19338780231 is a deficient number, since it is larger than the sum of its proper divisors (8595013449).

19338780231 is a wasteful number, since it uses less digits than its factorization.

19338780231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148753365 (or 2148753362 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 19338780231 in words is "nineteen billion, three hundred thirty-eight million, seven hundred eighty thousand, two hundred thirty-one".