20112247507 has 4 divisors (see below), whose sum is σ = 21940633656. Its totient is φ = 18283861360.

The previous prime is 20112247499. The next prime is 20112247537. The reversal of 20112247507 is 70574221102.

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 20112247507 - 2³ = 20112247499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112247537) 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, 914193058 + ... + 914193079.

It is an arithmetic number, because the mean of its divisors is an integer number (5485158414).

Almost surely, 2^20112247507 is an apocalyptic number.

20112247507 is a deficient number, since it is larger than the sum of its proper divisors (1828386149).

20112247507 is a wasteful number, since it uses less digits than its factorization.

20112247507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828386148.

The product of its (nonzero) digits is 7840, while the sum is 31.

Adding to 20112247507 its reverse (70574221102), we get a palindrome (90686468609).

The spelling of 20112247507 in words is "twenty billion, one hundred twelve million, two hundred forty-seven thousand, five hundred seven".