21048594009413 has 16 divisors (see below), whose sum is σ = 22835424089520. Its totient is φ = 19322943897600.

The previous prime is 21048594009409. The next prime is 21048594009427. The reversal of 21048594009413 is 31490049584012.

It can be written as a sum of positive squares in 8 ways, for example, as 171754711489 + 20876839297924 = 414433^2 + 4569118^2 .

It is a cyclic number.

It is not a de Polignac number, because 21048594009413 - 2² = 21048594009409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21048594009433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246398 + ... + 6492911.

It is an arithmetic number, because the mean of its divisors is an integer number (1427214005595).

Almost surely, 2^{21048594009413} is an apocalyptic number.

It is an amenable number.

21048594009413 is a deficient number, since it is larger than the sum of its proper divisors (1786830080107).

21048594009413 is a wasteful number, since it uses less digits than its factorization.

21048594009413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6743848.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 21048594009413 in words is "twenty-one trillion, forty-eight billion, five hundred ninety-four million, nine thousand, four hundred thirteen".