20836398215 has 16 divisors (see below), whose sum is σ = 25097791680. Its totient is φ = 16606437120.

The previous prime is 20836398199. The next prime is 20836398223. The reversal of 20836398215 is 51289363802.

It is not a de Polignac number, because 20836398215 - 2⁴ = 20836398199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20836398215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5485697 + ... + 5489493.

It is an arithmetic number, because the mean of its divisors is an integer number (1568611980).

Almost surely, 2^20836398215 is an apocalyptic number.

20836398215 is a deficient number, since it is larger than the sum of its proper divisors (4261393465).

20836398215 is a wasteful number, since it uses less digits than its factorization.

20836398215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7642.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 20836398215 in words is "twenty billion, eight hundred thirty-six million, three hundred ninety-eight thousand, two hundred fifteen".