19899005690 has 32 divisors (see below), whose sum is σ = 37413118080. Its totient is φ = 7610508864.

The previous prime is 19899005689. The next prime is 19899005701. The reversal of 19899005690 is 9650099891.

It is a super-2 number, since 2×19899005690² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303224 + ... + 362963.

It is an arithmetic number, because the mean of its divisors is an integer number (1169159940).

Almost surely, 2^19899005690 is an apocalyptic number.

19899005690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19899005690 is a deficient number, since it is larger than the sum of its proper divisors (17514112390).

19899005690 is a wasteful number, since it uses less digits than its factorization.

19899005690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666326.

The product of its (nonzero) digits is 1574640, while the sum is 56.

The spelling of 19899005690 in words is "nineteen billion, eight hundred ninety-nine million, five thousand, six hundred ninety".