21458747517403 has 12 divisors (see below), whose sum is σ = 25205015356752. Its totient is φ = 17896098307680.

The previous prime is 21458747517391. The next prime is 21458747517421. The reversal of 21458747517403 is 30471574785412.

It is not a de Polignac number, because 21458747517403 - 2⁹ = 21458747516891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21458747517503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1119616188 + ... + 1119635353.

It is an arithmetic number, because the mean of its divisors is an integer number (2100417946396).

Almost surely, 2^{21458747517403} is an apocalyptic number.

21458747517403 is a deficient number, since it is larger than the sum of its proper divisors (3746267839349).

21458747517403 is an equidigital number, since it uses as much as digits as its factorization.

21458747517403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239251622 (or 2239251585 counting only the distinct ones).

The product of its (nonzero) digits is 26342400, while the sum is 58.

The spelling of 21458747517403 in words is "twenty-one trillion, four hundred fifty-eight billion, seven hundred forty-seven million, five hundred seventeen thousand, four hundred three".