19942097280 has 128 divisors (see below), whose sum is σ = 72646260480. Its totient is φ = 4558190592.

The previous prime is 19942097267. The next prime is 19942097317. The reversal of 19942097280 is 8279024991.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-3 number, since 3×19942097280³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 728454 + ... + 755333.

It is an arithmetic number, because the mean of its divisors is an integer number (567548910).

Almost surely, 2^19942097280 is an apocalyptic number.

19942097280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19942097280 is an abundant number, since it is smaller than the sum of its proper divisors (52704163200).

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

19942097280 is a wasteful number, since it uses less digits than its factorization.

19942097280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483816 (or 1483804 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 51.

The spelling of 19942097280 in words is "nineteen billion, nine hundred forty-two million, ninety-seven thousand, two hundred eighty".