20769776215 has 8 divisors (see below), whose sum is σ = 25119982080. Its totient is φ = 16484987232.

The previous prime is 20769776213. The next prime is 20769776219. The reversal of 20769776215 is 51267796702.

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

It is a cyclic number.

It is not a de Polignac number, because 20769776215 - 2¹ = 20769776213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20769776213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16353520 + ... + 16354789.

It is an arithmetic number, because the mean of its divisors is an integer number (3139997760).

Almost surely, 2^20769776215 is an apocalyptic number.

20769776215 is a deficient number, since it is larger than the sum of its proper divisors (4350205865).

20769776215 is a wasteful number, since it uses less digits than its factorization.

20769776215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32708441.

The product of its (nonzero) digits is 2222640, while the sum is 52.

The spelling of 20769776215 in words is "twenty billion, seven hundred sixty-nine million, seven hundred seventy-six thousand, two hundred fifteen".