21444162033 has 64 divisors (see below), whose sum is σ = 36152524800. Its totient is φ = 11023594560.

The previous prime is 21444162017. The next prime is 21444162059. The reversal of 21444162033 is 33026144412.

It is not a de Polignac number, because 21444162033 - 2⁴ = 21444162017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21444162133) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1267198 + ... + 1284008.

It is an arithmetic number, because the mean of its divisors is an integer number (564883200).

Almost surely, 2^21444162033 is an apocalyptic number.

21444162033 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21444162033 is a deficient number, since it is larger than the sum of its proper divisors (14708362767).

21444162033 is a wasteful number, since it uses less digits than its factorization.

21444162033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17002.

The product of its (nonzero) digits is 13824, while the sum is 30.

The spelling of 21444162033 in words is "twenty-one billion, four hundred forty-four million, one hundred sixty-two thousand, thirty-three".