21446715245375 has 32 divisors (see below), whose sum is σ = 30600650895360. Its totient is φ = 14700786660000.

The previous prime is 21446715245353. The next prime is 21446715245383. The reversal of 21446715245375 is 57354251764412.

It is not a de Polignac number, because 21446715245375 - 2¹⁸ = 21446714983231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21446715245375.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2282351 + ... + 6935600.

It is an arithmetic number, because the mean of its divisors is an integer number (956270340480).

Almost surely, 2^{21446715245375} is an apocalyptic number.

21446715245375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21446715245375 is a deficient number, since it is larger than the sum of its proper divisors (9153935649985).

21446715245375 is an equidigital number, since it uses as much as digits as its factorization.

21446715245375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9220632 (or 9220622 counting only the distinct ones).

The product of its digits is 28224000, while the sum is 56.

The spelling of 21446715245375 in words is "twenty-one trillion, four hundred forty-six billion, seven hundred fifteen million, two hundred forty-five thousand, three hundred seventy-five".