22512507947 has 4 divisors (see below), whose sum is σ = 22513394136. Its totient is φ = 22511621760.

The previous prime is 22512507937. The next prime is 22512507949. The reversal of 22512507947 is 74970521522.

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 22512507947 - 2¹⁶ = 22512442411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22512507898 and 22512507907.

It is not an unprimeable number, because it can be changed into a prime (22512507949) 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, 403829 + ... + 456182.

It is an arithmetic number, because the mean of its divisors is an integer number (5628348534).

Almost surely, 2^22512507947 is an apocalyptic number.

22512507947 is a deficient number, since it is larger than the sum of its proper divisors (886189).

22512507947 is an equidigital number, since it uses as much as digits as its factorization.

22512507947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886188.

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 22512507947 in words is "twenty-two billion, five hundred twelve million, five hundred seven thousand, nine hundred forty-seven".