20687350825850 has 96 divisors (see below), whose sum is σ = 39571598255616. Its totient is φ = 8042357376000.

The previous prime is 20687350825847. The next prime is 20687350825877. The reversal of 20687350825850 is 5852805378602.

It is a self number, because there is not a number n which added to its sum of digits gives 20687350825850.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1175609252 + ... + 1175626848.

It is an arithmetic number, because the mean of its divisors is an integer number (412204148496).

Almost surely, 2^{20687350825850} is an apocalyptic number.

20687350825850 is a deficient number, since it is larger than the sum of its proper divisors (18884247429766).

20687350825850 is a wasteful number, since it uses less digits than its factorization.

20687350825850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21120 (or 21115 counting only the distinct ones).

The product of its (nonzero) digits is 32256000, while the sum is 59.

The spelling of 20687350825850 in words is "twenty trillion, six hundred eighty-seven billion, three hundred fifty million, eight hundred twenty-five thousand, eight hundred fifty".