204520433401 has 16 divisors (see below), whose sum is σ = 210798733824. Its totient is φ = 198330357184.

The previous prime is 204520433399. The next prime is 204520433413. The reversal of 204520433401 is 104334025402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 204520433401 - 2¹ = 204520433399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204520433401.

It is not an unprimeable number, because it can be changed into a prime (204520443401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2339460 + ... + 2425306.

It is an arithmetic number, because the mean of its divisors is an integer number (13174920864).

Almost surely, 2^204520433401 is an apocalyptic number.

It is an amenable number.

204520433401 is a deficient number, since it is larger than the sum of its proper divisors (6278300423).

204520433401 is a wasteful number, since it uses less digits than its factorization.

204520433401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86360.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 204520433401 its reverse (104334025402), we get a palindrome (308854458803).

The spelling of 204520433401 in words is "two hundred four billion, five hundred twenty million, four hundred thirty-three thousand, four hundred one".