19457331916 has 18 divisors (see below), whose sum is σ = 37427224100. Its totient is φ = 8844241560.

The previous prime is 19457331899. The next prime is 19457331917. The reversal of 19457331916 is 61913375491.

It is a self number, because there is not a number n which added to its sum of digits gives 19457331916.

It is not an unprimeable number, because it can be changed into a prime (19457331917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20100066 + ... + 20101033.

Almost surely, 2^19457331916 is an apocalyptic number.

It is an amenable number.

19457331916 is a deficient number, since it is larger than the sum of its proper divisors (17969892184).

19457331916 is a wasteful number, since it uses less digits than its factorization.

19457331916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40201125 (or 40201112 counting only the distinct ones).

The product of its digits is 612360, while the sum is 49.

The spelling of 19457331916 in words is "nineteen billion, four hundred fifty-seven million, three hundred thirty-one thousand, nine hundred sixteen".