204420007 has 4 divisors (see below), whose sum is σ = 223003656. Its totient is φ = 185836360.

The previous prime is 204420001. The next prime is 204420011. The reversal of 204420007 is 700024402.

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 204420007 - 2¹⁹ = 203895719 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 (204420001) 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, 9291808 + ... + 9291829.

It is an arithmetic number, because the mean of its divisors is an integer number (55750914).

Almost surely, 2^204420007 is an apocalyptic number.

204420007 is a deficient number, since it is larger than the sum of its proper divisors (18583649).

204420007 is a wasteful number, since it uses less digits than its factorization.

204420007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18583648.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 204420007 is about 14297.5524828552. The cubic root of 204420007 is about 589.0802551767.

Adding to 204420007 its reverse (700024402), we get a palindrome (904444409).

The spelling of 204420007 in words is "two hundred four million, four hundred twenty thousand, seven".