19370820816 has 120 divisors (see below), whose sum is σ = 59526440064. Its totient is φ = 6077099520.

The previous prime is 19370820803. The next prime is 19370820817. The reversal of 19370820816 is 61802807391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19370820817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80440 + ... + 212631.

Almost surely, 2^19370820816 is an apocalyptic number.

19370820816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19370820816 is an abundant number, since it is smaller than the sum of its proper divisors (40155619248).

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

19370820816 is a wasteful number, since it uses less digits than its factorization.

19370820816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293111 (or 293093 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 19370820816 in words is "nineteen billion, three hundred seventy million, eight hundred twenty thousand, eight hundred sixteen".