20344326213615 has 64 divisors (see below), whose sum is σ = 33368951531520. Its totient is φ = 10579389649920.

The previous prime is 20344326213611. The next prime is 20344326213623. The reversal of 20344326213615 is 51631262344302.

It is not a de Polignac number, because 20344326213615 - 2² = 20344326213611 is a prime.

It is a super-2 number, since 2×20344326213615² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344326213611) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1329078792 + ... + 1329094098.

It is an arithmetic number, because the mean of its divisors is an integer number (521389867680).

Almost surely, 2^{20344326213615} is an apocalyptic number.

20344326213615 is a deficient number, since it is larger than the sum of its proper divisors (13024625317905).

20344326213615 is a wasteful number, since it uses less digits than its factorization.

20344326213615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22352.

The product of its (nonzero) digits is 622080, while the sum is 42.

Adding to 20344326213615 its reverse (51631262344302), we get a palindrome (71975588557917).

The spelling of 20344326213615 in words is "twenty trillion, three hundred forty-four billion, three hundred twenty-six million, two hundred thirteen thousand, six hundred fifteen".