20839840215 has 8 divisors (see below), whose sum is σ = 33343744368. Its totient is φ = 11114581440.

The previous prime is 20839840181. The next prime is 20839840277. The reversal of 20839840215 is 51204893802.

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

It is not a de Polignac number, because 20839840215 - 2¹¹ = 20839838167 is a prime.

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, 694661326 + ... + 694661355.

It is an arithmetic number, because the mean of its divisors is an integer number (4167968046).

Almost surely, 2^20839840215 is an apocalyptic number.

20839840215 is a deficient number, since it is larger than the sum of its proper divisors (12503904153).

20839840215 is a wasteful number, since it uses less digits than its factorization.

20839840215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389322689.

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 20839840215 in words is "twenty billion, eight hundred thirty-nine million, eight hundred forty thousand, two hundred fifteen".