21335226545524 has 12 divisors (see below), whose sum is σ = 37492866734400. Its totient is φ = 10622978907128.

The previous prime is 21335226545509. The next prime is 21335226545537. The reversal of 21335226545524 is 42554562253312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11158590334 + ... + 11158592245.

It is an arithmetic number, because the mean of its divisors is an integer number (3124405561200).

Almost surely, 2^{21335226545524} is an apocalyptic number.

It is an amenable number.

21335226545524 is a deficient number, since it is larger than the sum of its proper divisors (16157640188876).

21335226545524 is a wasteful number, since it uses less digits than its factorization.

21335226545524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22317182822 (or 22317182820 counting only the distinct ones).

The product of its digits is 8640000, while the sum is 49.

Adding to 21335226545524 its reverse (42554562253312), we get a palindrome (63889788798836).

The spelling of 21335226545524 in words is "twenty-one trillion, three hundred thirty-five billion, two hundred twenty-six million, five hundred forty-five thousand, five hundred twenty-four".