204003345 has 64 divisors (see below), whose sum is σ = 405909504. Its totient is φ = 85190400.

The previous prime is 204003277. The next prime is 204003379. The reversal of 204003345 is 543300402.

It is a happy number.

It is not a de Polignac number, because 204003345 - 2¹² = 203999249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 139870 + ... + 141320.

It is an arithmetic number, because the mean of its divisors is an integer number (6342336).

Almost surely, 2^204003345 is an apocalyptic number.

It is an amenable number.

204003345 is a deficient number, since it is larger than the sum of its proper divisors (201906159).

204003345 is a wasteful number, since it uses less digits than its factorization.

204003345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 204003345 is about 14282.9739550277. The cubic root of 204003345 is about 588.6797491920.

Adding to 204003345 its reverse (543300402), we get a palindrome (747303747).

The spelling of 204003345 in words is "two hundred four million, three thousand, three hundred forty-five".