19137221412 has 12 divisors (see below), whose sum is σ = 44653516656. Its totient is φ = 6379073800.

The previous prime is 19137221393. The next prime is 19137221417. The reversal of 19137221412 is 21412273191.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×19137221412² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19137221417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 797384214 + ... + 797384237.

It is an arithmetic number, because the mean of its divisors is an integer number (3721126388).

Almost surely, 2^19137221412 is an apocalyptic number.

19137221412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19137221412 is an abundant number, since it is smaller than the sum of its proper divisors (25516295244).

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

19137221412 is a wasteful number, since it uses less digits than its factorization.

19137221412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594768458 (or 1594768456 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The spelling of 19137221412 in words is "nineteen billion, one hundred thirty-seven million, two hundred twenty-one thousand, four hundred twelve".