21343411475 has 12 divisors (see below), whose sum is σ = 26467927224. Its totient is φ = 17073376320.

The previous prime is 21343411457. The next prime is 21343411487. The reversal of 21343411475 is 57411434312.

It is not a de Polignac number, because 21343411475 - 2²² = 21339217171 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394247 + ... + 445103.

It is an arithmetic number, because the mean of its divisors is an integer number (2205660602).

Almost surely, 2^21343411475 is an apocalyptic number.

21343411475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21343411475 is a deficient number, since it is larger than the sum of its proper divisors (5124515749).

21343411475 is a wasteful number, since it uses less digits than its factorization.

21343411475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67654 (or 67649 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

Adding to 21343411475 its reverse (57411434312), we get a palindrome (78754845787).

The spelling of 21343411475 in words is "twenty-one billion, three hundred forty-three million, four hundred eleven thousand, four hundred seventy-five".