21453020529999 has 8 divisors (see below), whose sum is σ = 28604300443392. Its totient is φ = 14301877151640.

The previous prime is 21453020529949. The next prime is 21453020530061. The reversal of 21453020529999 is 99992502035412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21453020529999 - 2¹² = 21453020525903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21453020529949) 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 7 ways as a sum of consecutive naturals, for example, 33766569 + ... + 34396034.

It is an arithmetic number, because the mean of its divisors is an integer number (3575537555424).

Almost surely, 2^{21453020529999} is an apocalyptic number.

21453020529999 is a deficient number, since it is larger than the sum of its proper divisors (7151279913393).

21453020529999 is a wasteful number, since it uses less digits than its factorization.

21453020529999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68267517.

The product of its (nonzero) digits is 15746400, while the sum is 60.

The spelling of 21453020529999 in words is "twenty-one trillion, four hundred fifty-three billion, twenty million, five hundred twenty-nine thousand, nine hundred ninety-nine".