21253613452435 has 24 divisors (see below), whose sum is σ = 31950487040976. Its totient is φ = 13452836644800.

The previous prime is 21253613452373. The next prime is 21253613452447. The reversal of 21253613452435 is 53425431635212.

It is not a de Polignac number, because 21253613452435 - 2¹³ = 21253613444243 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 3336513841 + ... + 3336520210.

It is an arithmetic number, because the mean of its divisors is an integer number (1331270293374).

Almost surely, 2^{21253613452435} is an apocalyptic number.

21253613452435 is a deficient number, since it is larger than the sum of its proper divisors (10696873588541).

21253613452435 is a wasteful number, since it uses less digits than its factorization.

21253613452435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6673034083 (or 6673034076 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 46.

The spelling of 21253613452435 in words is "twenty-one trillion, two hundred fifty-three billion, six hundred thirteen million, four hundred fifty-two thousand, four hundred thirty-five".