204120011420 has 96 divisors (see below), whose sum is σ = 468248992512. Its totient is φ = 74287300608.

The previous prime is 204120011419. The next prime is 204120011423. The reversal of 204120011420 is 24110021402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204120011423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45227084 + ... + 45231596.

It is an arithmetic number, because the mean of its divisors is an integer number (4877593672).

Almost surely, 2^204120011420 is an apocalyptic number.

204120011420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204120011420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234124496256).

204120011420 is an abundant number, since it is smaller than the sum of its proper divisors (264128981092).

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

204120011420 is a wasteful number, since it uses less digits than its factorization.

204120011420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6991 (or 6989 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 204120011420 its reverse (24110021402), we get a palindrome (228230032822).

The spelling of 204120011420 in words is "two hundred four billion, one hundred twenty million, eleven thousand, four hundred twenty".