21612630527453 has 12 divisors (see below), whose sum is σ = 25227029506140. Its totient is φ = 18461886230592.

The previous prime is 21612630527419. The next prime is 21612630527491. The reversal of 21612630527453 is 35472503621612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14541089105284 + 7071541422169 = 3813278^2 + 2659237^2 .

It is not a de Polignac number, because 21612630527453 - 2²⁰ = 21612629478877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21612630527398 and 21612630527407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21612630527353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 752671808 + ... + 752700521.

It is an arithmetic number, because the mean of its divisors is an integer number (2102252458845).

Almost surely, 2^{21612630527453} is an apocalyptic number.

It is an amenable number.

21612630527453 is a deficient number, since it is larger than the sum of its proper divisors (3614398978687).

21612630527453 is a wasteful number, since it uses less digits than its factorization.

21612630527453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505372636 (or 1505372629 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 21612630527453 in words is "twenty-one trillion, six hundred twelve billion, six hundred thirty million, five hundred twenty-seven thousand, four hundred fifty-three".