19136791990 has 16 divisors (see below), whose sum is σ = 34486155648. Its totient is φ = 7645843456.

The previous prime is 19136791969. The next prime is 19136792027. The reversal of 19136791990 is 9919763191.

It is a congruent number.

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, 1100107 + ... + 1117366.

It is an arithmetic number, because the mean of its divisors is an integer number (2155384728).

Almost surely, 2^19136791990 is an apocalyptic number.

19136791990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19136791990 is a deficient number, since it is larger than the sum of its proper divisors (15349363658).

19136791990 is a wasteful number, since it uses less digits than its factorization.

19136791990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218343.

The product of its (nonzero) digits is 826686, while the sum is 55.

The spelling of 19136791990 in words is "nineteen billion, one hundred thirty-six million, seven hundred ninety-one thousand, nine hundred ninety".