21326306054 has 16 divisors (see below), whose sum is σ = 33384055392. Its totient is φ = 10198391808.

The previous prime is 21326306017. The next prime is 21326306069. The reversal of 21326306054 is 45060362312.

It is a super-5 number, since 5×21326306054⁵ (a number of 53 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 21326306054.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503732 + ... + 544424.

It is an arithmetic number, because the mean of its divisors is an integer number (2086503462).

Almost surely, 2^21326306054 is an apocalyptic number.

21326306054 is a deficient number, since it is larger than the sum of its proper divisors (12057749338).

21326306054 is a wasteful number, since it uses less digits than its factorization.

21326306054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52111.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 21326306054 its reverse (45060362312), we get a palindrome (66386668366).

The spelling of 21326306054 in words is "twenty-one billion, three hundred twenty-six million, three hundred six thousand, fifty-four".