20312225347 has 4 divisors (see below), whose sum is σ = 20315643400. Its totient is φ = 20308807296.

The previous prime is 20312225341. The next prime is 20312225357. The reversal of 20312225347 is 74352221302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20312225347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312225341) 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, 1700097 + ... + 1712002.

It is an arithmetic number, because the mean of its divisors is an integer number (5078910850).

Almost surely, 2^20312225347 is an apocalyptic number.

20312225347 is a deficient number, since it is larger than the sum of its proper divisors (3418053).

20312225347 is an equidigital number, since it uses as much as digits as its factorization.

20312225347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418052.

The product of its (nonzero) digits is 20160, while the sum is 31.

Adding to 20312225347 its reverse (74352221302), we get a palindrome (94664446649).

The spelling of 20312225347 in words is "twenty billion, three hundred twelve million, two hundred twenty-five thousand, three hundred forty-seven".