19911360858 has 16 divisors (see below), whose sum is σ = 39845616096. Its totient is φ = 6633304560.

The previous prime is 19911360839. The next prime is 19911360869. The reversal of 19911360858 is 85806311991.

It is a self number, because there is not a number n which added to its sum of digits gives 19911360858.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 942616 + ... + 963507.

It is an arithmetic number, because the mean of its divisors is an integer number (2490351006).

Almost surely, 2^19911360858 is an apocalyptic number.

19911360858 is an abundant number, since it is smaller than the sum of its proper divisors (19934255238).

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

19911360858 is a wasteful number, since it uses less digits than its factorization.

19911360858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907869.

The product of its (nonzero) digits is 466560, while the sum is 51.

The spelling of 19911360858 in words is "nineteen billion, nine hundred eleven million, three hundred sixty thousand, eight hundred fifty-eight".