2099721492 has 36 divisors (see below), whose sum is σ = 5790142176. Its totient is φ = 636279120.

The previous prime is 2099721431. The next prime is 2099721499. The reversal of 2099721492 is 2941279902.

2099721492 is a `hidden beast` number, since 2 + 0 + 99 + 72 + 1 + 492 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2099721499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2650768 + ... + 2651559.

Almost surely, 2^2099721492 is an apocalyptic number.

2099721492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2099721492 is an abundant number, since it is smaller than the sum of its proper divisors (3690420684).

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

2099721492 is a wasteful number, since it uses less digits than its factorization.

2099721492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5302348 (or 5302343 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 2099721492 is about 45822.7180773904. The cubic root of 2099721492 is about 1280.5225511288.

The spelling of 2099721492 in words is "two billion, ninety-nine million, seven hundred twenty-one thousand, four hundred ninety-two".