20163610815 has 16 divisors (see below), whose sum is σ = 32310748800. Its totient is φ = 10737601952.

The previous prime is 20163610807. The next prime is 20163610837. The reversal of 20163610815 is 51801636102.

It is a cyclic number.

It is not a de Polignac number, because 20163610815 - 2³ = 20163610807 is a prime.

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, 1010025 + ... + 1029794.

It is an arithmetic number, because the mean of its divisors is an integer number (2019421800).

Almost surely, 2^20163610815 is an apocalyptic number.

20163610815 is a deficient number, since it is larger than the sum of its proper divisors (12147137985).

20163610815 is a wasteful number, since it uses less digits than its factorization.

20163610815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040486.

The product of its (nonzero) digits is 8640, while the sum is 33.

It can be divided in two parts, 20163610 and 815, that added together give a triangular number (20164425 = T₆₃₅₀).

The spelling of 20163610815 in words is "twenty billion, one hundred sixty-three million, six hundred ten thousand, eight hundred fifteen".