22474729 has 4 divisors (see below), whose sum is σ = 22782676. Its totient is φ = 22166784.

The previous prime is 22474717. The next prime is 22474759. The reversal of 22474729 is 92747422.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16999129 + 5475600 = 4123^2 + 2340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22474729 is a prime.

It is a super-2 number, since 2×22474729² = 1010226887246882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22474759) 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, 153864 + ... + 154009.

It is an arithmetic number, because the mean of its divisors is an integer number (5695669).

Almost surely, 2^22474729 is an apocalyptic number.

It is an amenable number.

22474729 is a deficient number, since it is larger than the sum of its proper divisors (307947).

22474729 is an equidigital number, since it uses as much as digits as its factorization.

22474729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307946.

The product of its digits is 56448, while the sum is 37.

The square root of 22474729 is about 4740.7519445759. The cubic root of 22474729 is about 282.2050760853.

The spelling of 22474729 in words is "twenty-two million, four hundred seventy-four thousand, seven hundred twenty-nine".