21444032097 has 10 divisors (see below), whose sum is σ = 32033677698. Its totient is φ = 14296021344.

The previous prime is 21444031967. The next prime is 21444032143. The reversal of 21444032097 is 79023044412.

21444032097 is a `hidden beast` number, since 2 + 1 + 4 + 440 + 3 + 209 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13487570496 + 7956461601 = 116136^2 + 89199^2 .

It is not a de Polignac number, because 21444032097 - 2⁸ = 21444031841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21444232097) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 132370488 + ... + 132370649.

Almost surely, 2^21444032097 is an apocalyptic number.

21444032097 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

21444032097 is a deficient number, since it is larger than the sum of its proper divisors (10589645601).

21444032097 is an equidigital number, since it uses as much as digits as its factorization.

21444032097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264741149 (or 264741140 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 21444032097 in words is "twenty-one billion, four hundred forty-four million, thirty-two thousand, ninety-seven".