20604835955025 has 243 divisors, whose sum is σ = 45622786967121. Its totient is φ = 8861787809280.

The previous prime is 20604835954993. The next prime is 20604835955027. The reversal of 20604835955025 is 52055953840602.

The square root of 20604835955025 is 4539255.

It is a perfect power (a square), and thus also a powerful number.

20604835955025 is a `hidden beast` number, since 2 + 0 + 6 + 0 + 4 + 83 + 5 + 9 + 550 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 481967789121 + 20122868165904 = 694239^2 + 4485852^2 .

It is not a de Polignac number, because 20604835955025 - 2⁵ = 20604835954993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20604835955027) by changing a digit.

It is a polite number, since it can be written in 242 ways as a sum of consecutive naturals, for example, 8102568904 + ... + 8102571446.

Almost surely, 2^{20604835955025} is an apocalyptic number.

20604835955025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20604835955025 is the 4539255-th square number.

20604835955025 is the 2269628-th centered octagonal number.

It is an amenable number.

20604835955025 is an abundant number, since it is smaller than the sum of its proper divisors (25017951012096).

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

20604835955025 is an equidigital number, since it uses as much as digits as its factorization.

20604835955025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5150 (or 2575 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 54.

The spelling of 20604835955025 in words is "twenty trillion, six hundred four billion, eight hundred thirty-five million, nine hundred fifty-five thousand, twenty-five".