20215617001115 has 8 divisors (see below), whose sum is σ = 24258907237488. Its totient is φ = 16172382376800.

The previous prime is 20215617001081. The next prime is 20215617001171. The reversal of 20215617001115 is 51110071651202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20215617001115 - 2¹² = 20215616997019 is a prime.

It is a super-2 number, since 2×20215617001115² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13099061 + ... + 14560790.

It is an arithmetic number, because the mean of its divisors is an integer number (3032363404686).

Almost surely, 2^{20215617001115} is an apocalyptic number.

20215617001115 is a deficient number, since it is larger than the sum of its proper divisors (4043290236373).

20215617001115 is a wasteful number, since it uses less digits than its factorization.

20215617001115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27806029.

The product of its (nonzero) digits is 4200, while the sum is 32.

Adding to 20215617001115 its reverse (51110071651202), we get a palindrome (71325688652317).

The spelling of 20215617001115 in words is "twenty trillion, two hundred fifteen billion, six hundred seventeen million, one thousand, one hundred fifteen".