20615564214 has 24 divisors (see below), whose sum is σ = 51048064080. Its totient is φ = 5890161168.

The previous prime is 20615564213. The next prime is 20615564219. The reversal of 20615564214 is 41246551602.

20615564214 is a `hidden beast` number, since 2 + 0 + 6 + 1 + 5 + 5 + 642 + 1 + 4 = 666.

20615564214 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20615564213) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 81807669 + ... + 81807920.

It is an arithmetic number, because the mean of its divisors is an integer number (2127002670).

Almost surely, 2^20615564214 is an apocalyptic number.

20615564214 is an abundant number, since it is smaller than the sum of its proper divisors (30432499866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20615564214 is a wasteful number, since it uses less digits than its factorization.

20615564214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163615604 (or 163615601 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 20615564214 in words is "twenty billion, six hundred fifteen million, five hundred sixty-four thousand, two hundred fourteen".