21451082271503 has 8 divisors (see below), whose sum is σ = 21581443764000. Its totient is φ = 21320793960928.

The previous prime is 21451082271491. The next prime is 21451082271527. The reversal of 21451082271503 is 30517228015412.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21451082271503 - 2³⁸ = 21176204364559 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 (21451082271583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17707403 + ... + 18879996.

It is an arithmetic number, because the mean of its divisors is an integer number (2697680470500).

Almost surely, 2^{21451082271503} is an apocalyptic number.

21451082271503 is a deficient number, since it is larger than the sum of its proper divisors (130361492497).

21451082271503 is a wasteful number, since it uses less digits than its factorization.

21451082271503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36590961.

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 21451082271503 in words is "twenty-one trillion, four hundred fifty-one billion, eighty-two million, two hundred seventy-one thousand, five hundred three".