21452365617436 has 48 divisors (see below), whose sum is σ = 41110818301728. Its totient is φ = 9734374944000.

The previous prime is 21452365617401. The next prime is 21452365617437. The reversal of 21452365617436 is 63471656325412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21452365617437) 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, 5491611 + ... + 8547661.

It is an arithmetic number, because the mean of its divisors is an integer number (856475381286).

Almost surely, 2^{21452365617436} is an apocalyptic number.

21452365617436 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21452365617436 is a deficient number, since it is larger than the sum of its proper divisors (19658452684292).

21452365617436 is a wasteful number, since it uses less digits than its factorization.

21452365617436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058342 (or 3058340 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 55.

The spelling of 21452365617436 in words is "twenty-one trillion, four hundred fifty-two billion, three hundred sixty-five million, six hundred seventeen thousand, four hundred thirty-six".