20626345215 has 96 divisors (see below), whose sum is σ = 41352245376. Its totient is φ = 9316270080.

The previous prime is 20626345213. The next prime is 20626345219. The reversal of 20626345215 is 51254362602.

20626345215 is a `hidden beast` number, since 2 + 0 + 6 + 2 + 634 + 5 + 2 + 15 = 666.

It is not a de Polignac number, because 20626345215 - 2¹ = 20626345213 is a prime.

It is a super-2 number, since 2×20626345215² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20626345215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20626345211) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9543735 + ... + 9545895.

It is an arithmetic number, because the mean of its divisors is an integer number (430752556).

Almost surely, 2^20626345215 is an apocalyptic number.

20626345215 is an abundant number, since it is smaller than the sum of its proper divisors (20725900161).

20626345215 is a wasteful number, since it uses less digits than its factorization.

20626345215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529 (or 2526 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 20626345215 in words is "twenty billion, six hundred twenty-six million, three hundred forty-five thousand, two hundred fifteen".