19769381554 has 16 divisors (see below), whose sum is σ = 33615953280. Its totient is φ = 8644101840.

The previous prime is 19769381543. The next prime is 19769381561. The reversal of 19769381554 is 45518396791.

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, 20009002 + ... + 20009989.

It is an arithmetic number, because the mean of its divisors is an integer number (2100997080).

Almost surely, 2^19769381554 is an apocalyptic number.

19769381554 is a deficient number, since it is larger than the sum of its proper divisors (13846571726).

19769381554 is a wasteful number, since it uses less digits than its factorization.

19769381554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40019025.

The product of its digits is 8164800, while the sum is 58.

The spelling of 19769381554 in words is "nineteen billion, seven hundred sixty-nine million, three hundred eighty-one thousand, five hundred fifty-four".