204120424 has 8 divisors (see below), whose sum is σ = 382725810. Its totient is φ = 102060208.

The previous prime is 204120419. The next prime is 204120463. The reversal of 204120424 is 424021402.

It can be written as a sum of positive squares in only one way, i.e., 201924100 + 2196324 = 14210^2 + 1482^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12757519 + ... + 12757534.

Almost surely, 2^204120424 is an apocalyptic number.

It is an amenable number.

204120424 is a deficient number, since it is larger than the sum of its proper divisors (178605386).

204120424 is a wasteful number, since it uses less digits than its factorization.

204120424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25515059 (or 25515055 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 204120424 is about 14287.0719183463. The cubic root of 204120424 is about 588.7923435151.

Adding to 204120424 its reverse (424021402), we get a palindrome (628141826).

The spelling of 204120424 in words is "two hundred four million, one hundred twenty thousand, four hundred twenty-four".