22420045 has 8 divisors (see below), whose sum is σ = 27831960. Its totient is φ = 17317440.

The previous prime is 22420033. The next prime is 22420063. The reversal of 22420045 is 54002422.

It can be written as a sum of positive squares in 4 ways, for example, as 5822569 + 16597476 = 2413^2 + 4074^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22420045 - 2⁹ = 22419533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77166 + ... + 77455.

It is an arithmetic number, because the mean of its divisors is an integer number (3478995).

Almost surely, 2^22420045 is an apocalyptic number.

It is an amenable number.

22420045 is a deficient number, since it is larger than the sum of its proper divisors (5411915).

22420045 is a wasteful number, since it uses less digits than its factorization.

22420045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154655.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 22420045 is about 4734.9809925701. The cubic root of 22420045 is about 281.9760093938.

Adding to 22420045 its reverse (54002422), we get a palindrome (76422467).

The spelling of 22420045 in words is "twenty-two million, four hundred twenty thousand, forty-five".