20115162505015 has 16 divisors (see below), whose sum is σ = 24715267208928. Its totient is φ = 15711666195456.

The previous prime is 20115162505003. The next prime is 20115162505121. The reversal of 20115162505015 is 51050526151102.

It is a cyclic number.

It is not a de Polignac number, because 20115162505015 - 2⁷ = 20115162504887 is a prime.

It is a super-2 number, since 2×20115162505015² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

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, 265649142 + ... + 265724851.

It is an arithmetic number, because the mean of its divisors is an integer number (1544704200558).

Almost surely, 2^{20115162505015} is an apocalyptic number.

20115162505015 is a deficient number, since it is larger than the sum of its proper divisors (4600104703913).

20115162505015 is a wasteful number, since it uses less digits than its factorization.

20115162505015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531374178.

The product of its (nonzero) digits is 15000, while the sum is 34.

Adding to 20115162505015 its reverse (51050526151102), we get a palindrome (71165688656117).

The spelling of 20115162505015 in words is "twenty trillion, one hundred fifteen billion, one hundred sixty-two million, five hundred five thousand, fifteen".