20345371773256 has 16 divisors (see below), whose sum is σ = 38153047645440. Its totient is φ = 10171225734480.

The previous prime is 20345371773229. The next prime is 20345371773257. The reversal of 20345371773256 is 65237717354302.

It is a junction number, because it is equal to n+sod(n) for n = 20345371773197 and 20345371773206.

It is not an unprimeable number, because it can be changed into a prime (20345371773257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182459800 + ... + 182571271.

It is an arithmetic number, because the mean of its divisors is an integer number (2384565477840).

Almost surely, 2^{20345371773256} is an apocalyptic number.

It is an amenable number.

20345371773256 is a deficient number, since it is larger than the sum of its proper divisors (17807675872184).

20345371773256 is a wasteful number, since it uses less digits than its factorization.

20345371773256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365038044 (or 365038040 counting only the distinct ones).

The product of its (nonzero) digits is 22226400, while the sum is 55.

The spelling of 20345371773256 in words is "twenty trillion, three hundred forty-five billion, three hundred seventy-one million, seven hundred seventy-three thousand, two hundred fifty-six".