19978614292 has 96 divisors (see below), whose sum is σ = 44977766400. Its totient is φ = 7547202432.

The previous prime is 19978614281. The next prime is 19978614349. The reversal of 19978614292 is 29241687991.

It is a super-2 number, since 2×19978614292² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6017809 + ... + 6021127.

It is an arithmetic number, because the mean of its divisors is an integer number (468518400).

Almost surely, 2^19978614292 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19978614292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22488883200).

19978614292 is an abundant number, since it is smaller than the sum of its proper divisors (24999152108).

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

19978614292 is a wasteful number, since it uses less digits than its factorization.

19978614292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4085 (or 4083 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 58.

The spelling of 19978614292 in words is "nineteen billion, nine hundred seventy-eight million, six hundred fourteen thousand, two hundred ninety-two".