1916731212 has 24 divisors (see below), whose sum is σ = 4878952512. Its totient is φ = 580827600.

The previous prime is 1916731207. The next prime is 1916731231. The reversal of 1916731212 is 2121376191.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 7260214 + ... + 7260477.

It is an arithmetic number, because the mean of its divisors is an integer number (203289688).

Almost surely, 2^1916731212 is an apocalyptic number.

1916731212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1916731212 is an abundant number, since it is smaller than the sum of its proper divisors (2962221300).

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

1916731212 is a wasteful number, since it uses less digits than its factorization.

1916731212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14520709 (or 14520707 counting only the distinct ones).

The product of its digits is 4536, while the sum is 33.

The square root of 1916731212 is about 43780.4889419933. The cubic root of 1916731212 is about 1242.1872625345.

The spelling of 1916731212 in words is "one billion, nine hundred sixteen million, seven hundred thirty-one thousand, two hundred twelve".