204154442420 has 12 divisors (see below), whose sum is σ = 428724329124. Its totient is φ = 81661776960.

The previous prime is 204154442417. The next prime is 204154442423. The reversal of 204154442420 is 24244451402.

It is an interprime number because it is at equal distance from previous prime (204154442417) and next prime (204154442423).

It can be written as a sum of positive squares in 2 ways, for example, as 73795895716 + 130358546704 = 271654^2 + 361052^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204154442423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5103861041 + ... + 5103861080.

It is an arithmetic number, because the mean of its divisors is an integer number (35727027427).

Almost surely, 2^204154442420 is an apocalyptic number.

204154442420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204154442420 is an abundant number, since it is smaller than the sum of its proper divisors (224569886704).

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

204154442420 is a wasteful number, since it uses less digits than its factorization.

204154442420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10207722130 (or 10207722128 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 32.

Adding to 204154442420 its reverse (24244451402), we get a palindrome (228398893822).

The spelling of 204154442420 in words is "two hundred four billion, one hundred fifty-four million, four hundred forty-two thousand, four hundred twenty".