20344545642215 has 16 divisors (see below), whose sum is σ = 25475700712896. Its totient is φ = 15567516518400.

The previous prime is 20344545642191. The next prime is 20344545642283. The reversal of 20344545642215 is 51224654544302.

It is not a de Polignac number, because 20344545642215 - 2²² = 20344541447911 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20344545642215.

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, 992135 + ... + 6455495.

It is an arithmetic number, because the mean of its divisors is an integer number (1592231294556).

Almost surely, 2^{20344545642215} is an apocalyptic number.

20344545642215 is a deficient number, since it is larger than the sum of its proper divisors (5131155070681).

20344545642215 is a wasteful number, since it uses less digits than its factorization.

20344545642215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5495770.

The product of its (nonzero) digits is 4608000, while the sum is 47.

The spelling of 20344545642215 in words is "twenty trillion, three hundred forty-four billion, five hundred forty-five million, six hundred forty-two thousand, two hundred fifteen".