19021280040 has 192 divisors, whose sum is σ = 71618976000. Its totient is φ = 4288121856.

The previous prime is 19021280023. The next prime is 19021280051. The reversal of 19021280040 is 4008212091.

It is a junction number, because it is equal to n+sod(n) for n = 19021279986 and 19021280013.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 132261 + ... + 235659.

It is an arithmetic number, because the mean of its divisors is an integer number (373015500).

Almost surely, 2^19021280040 is an apocalyptic number.

19021280040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19021280040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35809488000).

19021280040 is an abundant number, since it is smaller than the sum of its proper divisors (52597695960).

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

19021280040 is a wasteful number, since it uses less digits than its factorization.

19021280040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103496 (or 103489 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 19021280040 in words is "nineteen billion, twenty-one million, two hundred eighty thousand, forty".