20866736750 has 32 divisors (see below), whose sum is σ = 39160132128. Its totient is φ = 8325840000.

The previous prime is 20866736749. The next prime is 20866736767. The reversal of 20866736750 is 5763766802.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3824 + ... + 204323.

It is an arithmetic number, because the mean of its divisors is an integer number (1223754129).

Almost surely, 2^20866736750 is an apocalyptic number.

20866736750 is a deficient number, since it is larger than the sum of its proper divisors (18293395378).

20866736750 is a wasteful number, since it uses less digits than its factorization.

20866736750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208565 (or 208555 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 20866736750 in words is "twenty billion, eight hundred sixty-six million, seven hundred thirty-six thousand, seven hundred fifty".