20155340046499 has 32 divisors (see below), whose sum is σ = 23267812723200. Its totient is φ = 17102238531840.

The previous prime is 20155340046463. The next prime is 20155340046529. The reversal of 20155340046499 is 99464004355102.

It is a happy number.

It is not a de Polignac number, because 20155340046499 - 2⁹ = 20155340045987 is a prime.

It is a super-2 number, since 2×20155340046499² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20155340040499) 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 31 ways as a sum of consecutive naturals, for example, 245101012 + ... + 245183230.

It is an arithmetic number, because the mean of its divisors is an integer number (727119147600).

Almost surely, 2^{20155340046499} is an apocalyptic number.

20155340046499 is a deficient number, since it is larger than the sum of its proper divisors (3112472676701).

20155340046499 is a wasteful number, since it uses less digits than its factorization.

20155340046499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83323.

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 20155340046499 in words is "twenty trillion, one hundred fifty-five billion, three hundred forty million, forty-six thousand, four hundred ninety-nine".