204025139520 has 224 divisors, whose sum is σ = 694215698688. Its totient is φ = 50634473472.

The previous prime is 204025139519. The next prime is 204025139551. The reversal of 204025139520 is 25931520402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 692092 + ... + 941828.

Almost surely, 2^204025139520 is an apocalyptic number.

204025139520 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 204025139520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347107849344).

204025139520 is an abundant number, since it is smaller than the sum of its proper divisors (490190559168).

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

204025139520 is a wasteful number, since it uses less digits than its factorization.

204025139520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249817 (or 249807 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 204025139520 its reverse (25931520402), we get a palindrome (229956659922).

The spelling of 204025139520 in words is "two hundred four billion, twenty-five million, one hundred thirty-nine thousand, five hundred twenty".