20572455347 has 4 divisors (see below), whose sum is σ = 20572960440. Its totient is φ = 20571950256.

The previous prime is 20572455329. The next prime is 20572455413. The reversal of 20572455347 is 74355427502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20572455347 - 2⁶ = 20572455283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20572455298 and 20572455307.

It is not an unprimeable number, because it can be changed into a prime (20572455847) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 185522 + ... + 274887.

It is an arithmetic number, because the mean of its divisors is an integer number (5143240110).

Almost surely, 2^20572455347 is an apocalyptic number.

20572455347 is a deficient number, since it is larger than the sum of its proper divisors (505093).

20572455347 is an equidigital number, since it uses as much as digits as its factorization.

20572455347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505092.

The product of its (nonzero) digits is 1176000, while the sum is 44.

The spelling of 20572455347 in words is "twenty billion, five hundred seventy-two million, four hundred fifty-five thousand, three hundred forty-seven".