204430421190 has 32 divisors (see below), whose sum is σ = 490645812960. Its totient is φ = 54513356544.

The previous prime is 204430421189. The next prime is 204430421191. The reversal of 204430421190 is 91124034402.

It is an interprime number because it is at equal distance from previous prime (204430421189) and next prime (204430421191).

It is a super-2 number, since 2×204430421190² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204430421191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1615956 + ... + 1737864.

It is an arithmetic number, because the mean of its divisors is an integer number (15332681655).

Almost surely, 2^204430421190 is an apocalyptic number.

204430421190 is an abundant number, since it is smaller than the sum of its proper divisors (286215391770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204430421190 is a wasteful number, since it uses less digits than its factorization.

204430421190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177816.

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 204430421190 its reverse (91124034402), we get a palindrome (295554455592).

The spelling of 204430421190 in words is "two hundred four billion, four hundred thirty million, four hundred twenty-one thousand, one hundred ninety".