1901819736 has 80 divisors (see below), whose sum is σ = 5344550640. Its totient is φ = 631834560.

The previous prime is 1901819701. The next prime is 1901819741. The reversal of 1901819736 is 6379181091.

It is a junction number, because it is equal to n+sod(n) for n = 1901819691 and 1901819700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 196810 + ... + 206246.

It is an arithmetic number, because the mean of its divisors is an integer number (66806883).

Almost surely, 2^1901819736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1901819736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2672275320).

1901819736 is an abundant number, since it is smaller than the sum of its proper divisors (3442730904).

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

1901819736 is a wasteful number, since it uses less digits than its factorization.

1901819736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9766 (or 9753 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 1901819736 is about 43609.8582432917. The cubic root of 1901819736 is about 1238.9576168747.

The spelling of 1901819736 in words is "one billion, nine hundred one million, eight hundred nineteen thousand, seven hundred thirty-six".