21252604661303 has 4 divisors (see below), whose sum is σ = 21264262701888. Its totient is φ = 21240946620720.

The previous prime is 21252604661261. The next prime is 21252604661357. The reversal of 21252604661303 is 30316640625212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21252604661303 - 2¹⁶ = 21252604595767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21252604661363) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 5829017558 + ... + 5829021203.

It is an arithmetic number, because the mean of its divisors is an integer number (5316065675472).

Almost surely, 2^{21252604661303} is an apocalyptic number.

21252604661303 is a deficient number, since it is larger than the sum of its proper divisors (11658040585).

21252604661303 is a wasteful number, since it uses less digits than its factorization.

21252604661303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11658040584.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 21252604661303 in words is "twenty-one trillion, two hundred fifty-two billion, six hundred four million, six hundred sixty-one thousand, three hundred three".