1819911996 has 96 divisors (see below), whose sum is σ = 5402432000. Its totient is φ = 519001344.

The previous prime is 1819911991. The next prime is 1819912021. The reversal of 1819911996 is 6991199181.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819911991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 466020 + ... + 469908.

Almost surely, 2^1819911996 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 1819911996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2701216000).

1819911996 is an abundant number, since it is smaller than the sum of its proper divisors (3582520004).

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

1819911996 is a wasteful number, since it uses less digits than its factorization.

1819911996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4528 (or 4520 counting only the distinct ones).

The product of its digits is 314928, while the sum is 54.

The square root of 1819911996 is about 42660.4265801457. The cubic root of 1819911996 is about 1220.9094705562.

The spelling of 1819911996 in words is "one billion, eight hundred nineteen million, nine hundred eleven thousand, nine hundred ninety-six".