21352045253 has 16 divisors (see below), whose sum is σ = 26623935360. Its totient is φ = 16635955200.

The previous prime is 21352045249. The next prime is 21352045291. The reversal of 21352045253 is 35254025312.

It is a cyclic number.

It is not a de Polignac number, because 21352045253 - 2² = 21352045249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21352045153) 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, 1195493 + ... + 1213221.

It is an arithmetic number, because the mean of its divisors is an integer number (1663995960).

Almost surely, 2^21352045253 is an apocalyptic number.

It is an amenable number.

21352045253 is a deficient number, since it is larger than the sum of its proper divisors (5271890107).

21352045253 is a wasteful number, since it uses less digits than its factorization.

21352045253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33388.

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 21352045253 in words is "twenty-one billion, three hundred fifty-two million, forty-five thousand, two hundred fifty-three".