2106491992 has 32 divisors (see below), whose sum is σ = 4425192720. Its totient is φ = 931616640.

The previous prime is 2106491983. The next prime is 2106491999. The reversal of 2106491992 is 2991946012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106491999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320223 + ... + 326734.

Almost surely, 2^2106491992 is an apocalyptic number.

2106491992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2106491992 is an abundant number, since it is smaller than the sum of its proper divisors (2318700728).

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

2106491992 is a wasteful number, since it uses less digits than its factorization.

2106491992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647011 (or 647007 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 2106491992 is about 45896.5357298348. The cubic root of 2106491992 is about 1281.8974122120.

The spelling of 2106491992 in words is "two billion, one hundred six million, four hundred ninety-one thousand, nine hundred ninety-two".