19771150842 has 40 divisors (see below), whose sum is σ = 46228206816. Its totient is φ = 6303844008.

The previous prime is 19771150781. The next prime is 19771150849. The reversal of 19771150842 is 24805117791.

It is a happy number.

19771150842 is a `hidden beast` number, since 1 + 97 + 7 + 11 + 508 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (19771150849) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2649408 + ... + 2656859.

Almost surely, 2^19771150842 is an apocalyptic number.

19771150842 is an abundant number, since it is smaller than the sum of its proper divisors (26457055974).

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

19771150842 is a wasteful number, since it uses less digits than its factorization.

19771150842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5306304 (or 5306295 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The spelling of 19771150842 in words is "nineteen billion, seven hundred seventy-one million, one hundred fifty thousand, eight hundred forty-two".