21343253212435 has 64 divisors (see below), whose sum is σ = 32077962952704. Its totient is φ = 13243972809600.

The previous prime is 21343253212427. The next prime is 21343253212459. The reversal of 21343253212435 is 53421235234312.

It is not a de Polignac number, because 21343253212435 - 2³ = 21343253212427 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 600473274 + ... + 600508816.

It is an arithmetic number, because the mean of its divisors is an integer number (501218171136).

Almost surely, 2^{21343253212435} is an apocalyptic number.

21343253212435 is a deficient number, since it is larger than the sum of its proper divisors (10734709740269).

21343253212435 is a wasteful number, since it uses less digits than its factorization.

21343253212435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42664.

The product of its digits is 518400, while the sum is 40.

Adding to 21343253212435 its reverse (53421235234312), we get a palindrome (74764488446747).

The spelling of 21343253212435 in words is "twenty-one trillion, three hundred forty-three billion, two hundred fifty-three million, two hundred twelve thousand, four hundred thirty-five".