19858792240 has 80 divisors (see below), whose sum is σ = 53004607488. Its totient is φ = 6778153728.

The previous prime is 19858792207. The next prime is 19858792277. The reversal of 19858792240 is 4229785891.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45369 + ... + 204391.

Almost surely, 2^19858792240 is an apocalyptic number.

19858792240 is a gapful number since it is divisible by the number (10) 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 19858792240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26502303744).

19858792240 is an abundant number, since it is smaller than the sum of its proper divisors (33145815248).

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

19858792240 is a wasteful number, since it uses less digits than its factorization.

19858792240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159266 (or 159260 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 19858792240 in words is "nineteen billion, eight hundred fifty-eight million, seven hundred ninety-two thousand, two hundred forty".