21442624412 has 72 divisors (see below), whose sum is σ = 42627302256. Its totient is φ = 9425724000.

The previous prime is 21442624403. The next prime is 21442624451.

21442624412 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21442624412² (a number of 21 digits) 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 23 ways as a sum of consecutive naturals, for example, 212303162 + ... + 212303262.

Almost surely, 2^21442624412 is an apocalyptic number.

21442624412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21442624412 is a deficient number, since it is larger than the sum of its proper divisors (21184677844).

21442624412 is an equidigital number, since it uses as much as digits as its factorization.

21442624412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 157 counting only the distinct ones).

The product of its digits is 24576, while the sum is 32.

The spelling of 21442624412 in words is "twenty-one billion, four hundred forty-two million, six hundred twenty-four thousand, four hundred twelve".