21624442612 has 12 divisors (see below), whose sum is σ = 40068820260. Its totient is φ = 10176208256.

The previous prime is 21624442601. The next prime is 21624442627.

21624442612 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 18223920016 + 3400522596 = 134996^2 + 58314^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159003187 + ... + 159003322.

It is an arithmetic number, because the mean of its divisors is an integer number (3339068355).

Almost surely, 2^21624442612 is an apocalyptic number.

It is an amenable number.

21624442612 is a deficient number, since it is larger than the sum of its proper divisors (18444377648).

21624442612 is a wasteful number, since it uses less digits than its factorization.

21624442612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318006530 (or 318006528 counting only the distinct ones).

The product of its digits is 36864, while the sum is 34.

The spelling of 21624442612 in words is "twenty-one billion, six hundred twenty-four million, four hundred forty-two thousand, six hundred twelve".