21836489345 has 8 divisors (see below), whose sum is σ = 28585949760. Its totient is φ = 15881083120.

The previous prime is 21836489333. The next prime is 21836489401. The reversal of 21836489345 is 54398463812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21836489345 - 2⁸ = 21836489089 is a prime.

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, 198513485 + ... + 198513594.

It is an arithmetic number, because the mean of its divisors is an integer number (3573243720).

Almost surely, 2^21836489345 is an apocalyptic number.

It is an amenable number.

21836489345 is a deficient number, since it is larger than the sum of its proper divisors (6749460415).

21836489345 is a wasteful number, since it uses less digits than its factorization.

21836489345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397027095.

The product of its digits is 4976640, while the sum is 53.

The spelling of 21836489345 in words is "twenty-one billion, eight hundred thirty-six million, four hundred eighty-nine thousand, three hundred forty-five".