1919113720 has 16 divisors (see below), whose sum is σ = 4318005960. Its totient is φ = 767645472.

The previous prime is 1919113711. The next prime is 1919113747. The reversal of 1919113720 is 273119191.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 23988882 + ... + 23988961.

Almost surely, 2^1919113720 is an apocalyptic number.

1919113720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1919113720 is an abundant number, since it is smaller than the sum of its proper divisors (2398892240).

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

1919113720 is a wasteful number, since it uses less digits than its factorization.

1919113720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47977854 (or 47977850 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 34.

The square root of 1919113720 is about 43807.6901924765. The cubic root of 1919113720 is about 1242.7017314185.

The spelling of 1919113720 in words is "one billion, nine hundred nineteen million, one hundred thirteen thousand, seven hundred twenty".