20915081335 has 16 divisors (see below), whose sum is σ = 26035712640. Its totient is φ = 16117320960.

The previous prime is 20915081309. The next prime is 20915081339. The reversal of 20915081335 is 53318051902.

It is a happy number.

It is not a de Polignac number, because 20915081335 - 2²³ = 20906692727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20915081294 and 20915081303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20915081339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 629532 + ... + 661921.

It is an arithmetic number, because the mean of its divisors is an integer number (1627232040).

Almost surely, 2^20915081335 is an apocalyptic number.

20915081335 is a deficient number, since it is larger than the sum of its proper divisors (5120631305).

20915081335 is a wasteful number, since it uses less digits than its factorization.

20915081335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291578.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 20915081335 in words is "twenty billion, nine hundred fifteen million, eighty-one thousand, three hundred thirty-five".