19901099010 has 64 divisors (see below), whose sum is σ = 51908693760. Its totient is φ = 4853779200.

The previous prime is 19901098969. The next prime is 19901099021. The reversal of 19901099010 is 1099010991.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 19901099010.

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, 191566 + ... + 276585.

It is an arithmetic number, because the mean of its divisors is an integer number (811073340).

Almost surely, 2^19901099010 is an apocalyptic number.

19901099010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19901099010 is an abundant number, since it is smaller than the sum of its proper divisors (32007594750).

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

19901099010 is a wasteful number, since it uses less digits than its factorization.

19901099010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468283.

The product of its (nonzero) digits is 6561, while the sum is 39.

The spelling of 19901099010 in words is "nineteen billion, nine hundred one million, ninety-nine thousand, ten".