21033109995 has 32 divisors (see below), whose sum is σ = 34828185600. Its totient is φ = 10826250624.

The previous prime is 21033109963. The next prime is 21033109997. The reversal of 21033109995 is 59990133012.

It is not a de Polignac number, because 21033109995 - 2⁵ = 21033109963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21033109997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1173874 + ... + 1191656.

It is an arithmetic number, because the mean of its divisors is an integer number (1088380800).

Almost surely, 2^21033109995 is an apocalyptic number.

21033109995 is a deficient number, since it is larger than the sum of its proper divisors (13795075605).

21033109995 is a wasteful number, since it uses less digits than its factorization.

21033109995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20539.

The product of its (nonzero) digits is 65610, while the sum is 42.

The spelling of 21033109995 in words is "twenty-one billion, thirty-three million, one hundred nine thousand, nine hundred ninety-five".