20015122055 has 32 divisors (see below), whose sum is σ = 24827214528. Its totient is φ = 15482649600.

The previous prime is 20015122037. The next prime is 20015122087. The reversal of 20015122055 is 55022151002.

It is not a de Polignac number, because 20015122055 - 2¹⁸ = 20014859911 is a prime.

It is a super-2 number, since 2×20015122055² (a number of 21 digits) contains 22 as substring.

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 20015122055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16776539 + ... + 16777731.

It is an arithmetic number, because the mean of its divisors is an integer number (775850454).

Almost surely, 2^20015122055 is an apocalyptic number.

20015122055 is a deficient number, since it is larger than the sum of its proper divisors (4812092473).

20015122055 is a wasteful number, since it uses less digits than its factorization.

20015122055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147.

The product of its (nonzero) digits is 1000, while the sum is 23.

Adding to 20015122055 its reverse (55022151002), we get a palindrome (75037273057).

The spelling of 20015122055 in words is "twenty billion, fifteen million, one hundred twenty-two thousand, fifty-five".