19828112940 has 36 divisors (see below), whose sum is σ = 60145276464. Its totient is φ = 5287496736.

The previous prime is 19828112923. The next prime is 19828112959. The reversal of 19828112940 is 4921182891.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×19828112940² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55077912 + ... + 55078271.

It is an arithmetic number, because the mean of its divisors is an integer number (1670702124).

Almost surely, 2^19828112940 is an apocalyptic number.

19828112940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19828112940 is an abundant number, since it is smaller than the sum of its proper divisors (40317163524).

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

19828112940 is a wasteful number, since it uses less digits than its factorization.

19828112940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110156198 (or 110156193 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 19828112940 in words is "nineteen billion, eight hundred twenty-eight million, one hundred twelve thousand, nine hundred forty".