20354440432215 has 16 divisors (see below), whose sum is σ = 32581650124800. Its totient is φ = 10850853086112.

The previous prime is 20354440432211. The next prime is 20354440432237. The reversal of 20354440432215 is 51223404445302.

It is not a de Polignac number, because 20354440432215 - 2² = 20354440432211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20354440432211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302995155 + ... + 303062324.

It is an arithmetic number, because the mean of its divisors is an integer number (2036353132800).

Almost surely, 2^{20354440432215} is an apocalyptic number.

20354440432215 is a deficient number, since it is larger than the sum of its proper divisors (12227209692585).

20354440432215 is a wasteful number, since it uses less digits than its factorization.

20354440432215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606059726.

The product of its (nonzero) digits is 460800, while the sum is 39.

Adding to 20354440432215 its reverse (51223404445302), we get a palindrome (71577844877517).

The spelling of 20354440432215 in words is "twenty trillion, three hundred fifty-four billion, four hundred forty million, four hundred thirty-two thousand, two hundred fifteen".