21543348046 has 16 divisors (see below), whose sum is σ = 35255606400. Its totient is φ = 9791637880.

The previous prime is 21543348031. The next prime is 21543348077. The reversal of 21543348046 is 64084334512.

It is a super-5 number, since 5×21543348046⁵ (a number of 53 digits) contains 55555 as substring.

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, 304575 + ... + 368581.

It is an arithmetic number, because the mean of its divisors is an integer number (2203475400).

Almost surely, 2^21543348046 is an apocalyptic number.

21543348046 is a deficient number, since it is larger than the sum of its proper divisors (13712258354).

21543348046 is a wasteful number, since it uses less digits than its factorization.

21543348046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79319.

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 21543348046 in words is "twenty-one billion, five hundred forty-three million, three hundred forty-eight thousand, forty-six".