19078015780 has 48 divisors (see below), whose sum is σ = 40186129536. Its totient is φ = 7607959040.

The previous prime is 19078015769. The next prime is 19078015807. The reversal of 19078015780 is 8751087091.

It is a super-2 number, since 2×19078015780² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19078015780.

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, 18503865 + ... + 18504895.

It is an arithmetic number, because the mean of its divisors is an integer number (837211032).

Almost surely, 2^19078015780 is an apocalyptic number.

19078015780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19078015780 is an abundant number, since it is smaller than the sum of its proper divisors (21108113756).

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

19078015780 is a wasteful number, since it uses less digits than its factorization.

19078015780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2964 (or 2962 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 46.

The spelling of 19078015780 in words is "nineteen billion, seventy-eight million, fifteen thousand, seven hundred eighty".