2091972372 has 24 divisors (see below), whose sum is σ = 5578593216. Its totient is φ = 597706368.

The previous prime is 2091972359. The next prime is 2091972373. The reversal of 2091972372 is 2732791902.

It is a super-2 number, since 2×2091972372² = 8752696810422612768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091972373) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12452133 + ... + 12452300.

It is an arithmetic number, because the mean of its divisors is an integer number (232441384).

Almost surely, 2^2091972372 is an apocalyptic number.

It is an amenable number.

2091972372 is an abundant number, since it is smaller than the sum of its proper divisors (3486620844).

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

2091972372 is a wasteful number, since it uses less digits than its factorization.

2091972372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24904447 (or 24904445 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 2091972372 is about 45738.0844810974. The cubic root of 2091972372 is about 1278.9453332228.

The spelling of 2091972372 in words is "two billion, ninety-one million, nine hundred seventy-two thousand, three hundred seventy-two".