19937229312 has 320 divisors, whose sum is σ = 71319435264. Its totient is φ = 4779786240.

The previous prime is 19937229293. The next prime is 19937229313. The reversal of 19937229312 is 21392273991.

It is a super-2 number, since 2×19937229312² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (19937229313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1531053 + ... + 1544019.

Almost surely, 2^19937229312 is an apocalyptic number.

19937229312 is a gapful number since it is divisible by the number (12) 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 19937229312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35659717632).

19937229312 is an abundant number, since it is smaller than the sum of its proper divisors (51382205952).

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

19937229312 is a wasteful number, since it uses less digits than its factorization.

19937229312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13019 (or 13003 counting only the distinct ones).

The product of its digits is 367416, while the sum is 48.

The spelling of 19937229312 in words is "nineteen billion, nine hundred thirty-seven million, two hundred twenty-nine thousand, three hundred twelve".