19902805370 has 32 divisors (see below), whose sum is σ = 40963805568. Its totient is φ = 6820337088.

The previous prime is 19902805361. The next prime is 19902805427. The reversal of 19902805370 is 7350820991.

19902805370 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×19902805370² (a number of 21 digits) contains 22 as substring.

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, 67544 + ... + 210636.

It is an arithmetic number, because the mean of its divisors is an integer number (1280118924).

Almost surely, 2^19902805370 is an apocalyptic number.

19902805370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19902805370 is an abundant number, since it is smaller than the sum of its proper divisors (21061000198).

19902805370 is a wasteful number, since it uses less digits than its factorization.

19902805370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145094.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 19902805370 in words is "nineteen billion, nine hundred two million, eight hundred five thousand, three hundred seventy".