19013021220 has 24 divisors (see below), whose sum is σ = 53236459584. Its totient is φ = 5070138976.

The previous prime is 19013021219. The next prime is 19013021227. The reversal of 19013021220 is 2212031091.

It is a super-2 number, since 2×19013021220² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19013021227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158441784 + ... + 158441903.

It is an arithmetic number, because the mean of its divisors is an integer number (2218185816).

Almost surely, 2^19013021220 is an apocalyptic number.

19013021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19013021220 is an abundant number, since it is smaller than the sum of its proper divisors (34223438364).

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

19013021220 is a wasteful number, since it uses less digits than its factorization.

19013021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316883699 (or 316883697 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The spelling of 19013021220 in words is "nineteen billion, thirteen million, twenty-one thousand, two hundred twenty".