20851528786 has 32 divisors (see below), whose sum is σ = 35319499200. Its totient is φ = 9145375680.

The previous prime is 20851528783. The next prime is 20851528787. The reversal of 20851528786 is 68782515802.

It is not an unprimeable number, because it can be changed into a prime (20851528783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1096225 + ... + 1115083.

It is an arithmetic number, because the mean of its divisors is an integer number (1103734350).

Almost surely, 2^20851528786 is an apocalyptic number.

20851528786 is a deficient number, since it is larger than the sum of its proper divisors (14467970414).

20851528786 is a wasteful number, since it uses less digits than its factorization.

20851528786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20634.

The product of its (nonzero) digits is 2150400, while the sum is 52.

The spelling of 20851528786 in words is "twenty billion, eight hundred fifty-one million, five hundred twenty-eight thousand, seven hundred eighty-six".