19381845740 has 48 divisors (see below), whose sum is σ = 41539750560. Its totient is φ = 7594083840.

The previous prime is 19381845739. The next prime is 19381845773. The reversal of 19381845740 is 4754818391.

It is a happy number.

It is a super-2 number, since 2×19381845740² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302354 + ... + 360806.

It is an arithmetic number, because the mean of its divisors is an integer number (865411470).

Almost surely, 2^19381845740 is an apocalyptic number.

19381845740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19381845740 is an abundant number, since it is smaller than the sum of its proper divisors (22157904820).

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

19381845740 is a wasteful number, since it uses less digits than its factorization.

19381845740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58802 (or 58800 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 19381845740 in words is "nineteen billion, three hundred eighty-one million, eight hundred forty-five thousand, seven hundred forty".