22747487 has 4 divisors (see below), whose sum is σ = 25997136. Its totient is φ = 19497840.

The previous prime is 22747481. The next prime is 22747511. The reversal of 22747487 is 78474722.

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 22747487 - 2⁶ = 22747423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22747481) 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, 1624814 + ... + 1624827.

It is an arithmetic number, because the mean of its divisors is an integer number (6499284).

Almost surely, 2^22747487 is an apocalyptic number.

22747487 is a deficient number, since it is larger than the sum of its proper divisors (3249649).

22747487 is an equidigital number, since it uses as much as digits as its factorization.

22747487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3249648.

The product of its digits is 175616, while the sum is 41.

The square root of 22747487 is about 4769.4325658300. The cubic root of 22747487 is about 283.3421218343.

The spelling of 22747487 in words is "twenty-two million, seven hundred forty-seven thousand, four hundred eighty-seven".