2099621965 has 32 divisors (see below), whose sum is σ = 2904433920. Its totient is φ = 1427328000.

The previous prime is 2099621957. The next prime is 2099621981. The reversal of 2099621965 is 5691269902.

It is not a de Polignac number, because 2099621965 - 2³ = 2099621957 is a prime.

It is a super-2 number, since 2×2099621965² = 8816824791820922450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2961031 + ... + 2961739.

It is an arithmetic number, because the mean of its divisors is an integer number (90763560).

Almost surely, 2^2099621965 is an apocalyptic number.

It is an amenable number.

2099621965 is a deficient number, since it is larger than the sum of its proper divisors (804811955).

2099621965 is a wasteful number, since it uses less digits than its factorization.

2099621965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333.

The product of its (nonzero) digits is 524880, while the sum is 49.

The square root of 2099621965 is about 45821.6320639062. The cubic root of 2099621965 is about 1280.5023185119.

The spelling of 2099621965 in words is "two billion, ninety-nine million, six hundred twenty-one thousand, nine hundred sixty-five".