22742705 has 4 divisors (see below), whose sum is σ = 27291252. Its totient is φ = 18194160.

The previous prime is 22742663. The next prime is 22742711. The reversal of 22742705 is 50724722.

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 10471696 + 12271009 = 3236^2 + 3503^2 .

It is not a de Polignac number, because 22742705 - 2¹⁰ = 22741681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2274266 + ... + 2274275.

It is an arithmetic number, because the mean of its divisors is an integer number (6822813).

Almost surely, 2^22742705 is an apocalyptic number.

It is an amenable number.

22742705 is a deficient number, since it is larger than the sum of its proper divisors (4548547).

22742705 is an equidigital number, since it uses as much as digits as its factorization.

22742705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4548546.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 22742705 is about 4768.9312219826. The cubic root of 22742705 is about 283.3222656192.

The spelling of 22742705 in words is "twenty-two million, seven hundred forty-two thousand, seven hundred five".