204021034431 has 32 divisors (see below), whose sum is σ = 285439085568. Its totient is φ = 129486658560.

The previous prime is 204021034391. The next prime is 204021034531. The reversal of 204021034431 is 134430120402.

It is not a de Polignac number, because 204021034431 - 2²¹ = 204018937279 is a prime.

It is a super-2 number, since 2×204021034431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204021034031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1895836 + ... + 2000558.

It is an arithmetic number, because the mean of its divisors is an integer number (8919971424).

Almost surely, 2^204021034431 is an apocalyptic number.

204021034431 is a deficient number, since it is larger than the sum of its proper divisors (81418051137).

204021034431 is a wasteful number, since it uses less digits than its factorization.

204021034431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105151.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 204021034431 its reverse (134430120402), we get a palindrome (338451154833).

The spelling of 204021034431 in words is "two hundred four billion, twenty-one million, thirty-four thousand, four hundred thirty-one".