21624212630452 has 6 divisors (see below), whose sum is σ = 37842372103298. Its totient is φ = 10812106315224.

The previous prime is 21624212630443. The next prime is 21624212630533. The reversal of 21624212630452 is 25403621242612.

It can be written as a sum of positive squares in only one way, i.e., 21427215134116 + 196997496336 = 4628954^2 + 443844^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2703026578803 + ... + 2703026578810.

Almost surely, 2^{21624212630452} is an apocalyptic number.

It is an amenable number.

21624212630452 is a deficient number, since it is larger than the sum of its proper divisors (16218159472846).

21624212630452 is a wasteful number, since it uses less digits than its factorization.

21624212630452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5406053157617 (or 5406053157615 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 21624212630452 in words is "twenty-one trillion, six hundred twenty-four billion, two hundred twelve million, six hundred thirty thousand, four hundred fifty-two".