21446623241 has 6 divisors (see below), whose sum is σ = 22782399390. Its totient is φ = 20185056896.

The previous prime is 21446623181. The next prime is 21446623277. The reversal of 21446623241 is 14232664412.

It can be written as a sum of positive squares in 3 ways, for example, as 13707726400 + 7738896841 = 117080^2 + 87971^2 .

It is a de Polignac number, because none of the positive numbers 2^k-21446623241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21446623291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37104596 + ... + 37105173.

It is an arithmetic number, because the mean of its divisors is an integer number (3797066565).

Almost surely, 2^21446623241 is an apocalyptic number.

It is an amenable number.

21446623241 is a deficient number, since it is larger than the sum of its proper divisors (1335776149).

21446623241 is an equidigital number, since it uses as much as digits as its factorization.

21446623241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74209803 (or 74209786 counting only the distinct ones).

The product of its digits is 55296, while the sum is 35.

The spelling of 21446623241 in words is "twenty-one billion, four hundred forty-six million, six hundred twenty-three thousand, two hundred forty-one".