22720650247 has 4 divisors (see below), whose sum is σ = 22731284416. Its totient is φ = 22710016080.

The previous prime is 22720650223. The next prime is 22720650283. The reversal of 22720650247 is 74205602722.

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 22720650247 - 2¹¹ = 22720648199 is a prime.

It is a super-2 number, since 2×22720650247² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22720650287) 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, 5313879 + ... + 5318152.

It is an arithmetic number, because the mean of its divisors is an integer number (5682821104).

Almost surely, 2^22720650247 is an apocalyptic number.

22720650247 is a deficient number, since it is larger than the sum of its proper divisors (10634169).

22720650247 is a wasteful number, since it uses less digits than its factorization.

22720650247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10634168.

The product of its (nonzero) digits is 94080, while the sum is 37.

The spelling of 22720650247 in words is "twenty-two billion, seven hundred twenty million, six hundred fifty thousand, two hundred forty-seven".