21452944990607 has 12 divisors (see below), whose sum is σ = 23231901204864. Its totient is φ = 19801193256000.

The previous prime is 21452944990567. The next prime is 21452944990637. The reversal of 21452944990607 is 70609944925412.

It is not a de Polignac number, because 21452944990607 - 2²⁴ = 21452928213391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21452944990607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21452944990637) 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, 2684783 + ... + 7079120.

It is an arithmetic number, because the mean of its divisors is an integer number (1935991767072).

Almost surely, 2^{21452944990607} is an apocalyptic number.

21452944990607 is a deficient number, since it is larger than the sum of its proper divisors (1778956214257).

21452944990607 is a wasteful number, since it uses less digits than its factorization.

21452944990607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9776930 (or 9776917 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 62.

The spelling of 21452944990607 in words is "twenty-one trillion, four hundred fifty-two billion, nine hundred forty-four million, nine hundred ninety thousand, six hundred seven".