20102566115 has 8 divisors (see below), whose sum is σ = 24954909840. Its totient is φ = 15527499232.

The previous prime is 20102566109. The next prime is 20102566123. The reversal of 20102566115 is 51166520102.

It is a happy number.

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

It is not a de Polignac number, because 20102566115 - 2⁶ = 20102566051 is a prime.

It is a super-2 number, since 2×20102566115² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69319049 + ... + 69319338.

It is an arithmetic number, because the mean of its divisors is an integer number (3119363730).

Almost surely, 2^20102566115 is an apocalyptic number.

20102566115 is a deficient number, since it is larger than the sum of its proper divisors (4852343725).

20102566115 is a wasteful number, since it uses less digits than its factorization.

20102566115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138638421.

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 20102566115 in words is "twenty billion, one hundred two million, five hundred sixty-six thousand, one hundred fifteen".