21205337159086 has 8 divisors (see below), whose sum is σ = 33482111303880. Its totient is φ = 10044633391128.

The previous prime is 21205337159051. The next prime is 21205337159087. The reversal of 21205337159086 is 68095173350212.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21205337159087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279017594161 + ... + 279017594236.

It is an arithmetic number, because the mean of its divisors is an integer number (4185263912985).

Almost surely, 2^{21205337159086} is an apocalyptic number.

21205337159086 is a deficient number, since it is larger than the sum of its proper divisors (12276774144794).

21205337159086 is a wasteful number, since it uses less digits than its factorization.

21205337159086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558035188418.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 21205337159086 in words is "twenty-one trillion, two hundred five billion, three hundred thirty-seven million, one hundred fifty-nine thousand, eighty-six".