1930811900 has 36 divisors (see below), whose sum is σ = 4192257720. Its totient is φ = 771883200.

The previous prime is 1930811899. The next prime is 1930811921. The reversal of 1930811900 is 91180391.

It is a super-2 number, since 2×1930811900² = 7456069186363220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213470 + ... + 222330.

Almost surely, 2^1930811900 is an apocalyptic number.

1930811900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1930811900 is an abundant number, since it is smaller than the sum of its proper divisors (2261445820).

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

1930811900 is a wasteful number, since it uses less digits than its factorization.

1930811900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11054 (or 11047 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 1930811900 is about 43941.0047677565. The cubic root of 1930811900 is about 1245.2216290120.

The spelling of 1930811900 in words is "one billion, nine hundred thirty million, eight hundred eleven thousand, nine hundred".