20360645851 has 16 divisors (see below), whose sum is σ = 25113432064. Its totient is φ = 16074694944.

The previous prime is 20360645849. The next prime is 20360645909. The reversal of 20360645851 is 15854606302.

It is not a de Polignac number, because 20360645851 - 2¹ = 20360645849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20360645821) 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, 199491 + ... + 283756.

It is an arithmetic number, because the mean of its divisors is an integer number (1569589504).

Almost surely, 2^20360645851 is an apocalyptic number.

20360645851 is a deficient number, since it is larger than the sum of its proper divisors (4752786213).

20360645851 is a wasteful number, since it uses less digits than its factorization.

20360645851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483730.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 20360645851 in words is "twenty billion, three hundred sixty million, six hundred forty-five thousand, eight hundred fifty-one".