2005020817925 has 6 divisors (see below), whose sum is σ = 2486225814258. Its totient is φ = 1604016654320.

The previous prime is 2005020817909. The next prime is 2005020817951. The reversal of 2005020817925 is 5297180205002.

It can be written as a sum of positive squares in 3 ways, for example, as 91067547076 + 1913953270849 = 301774^2 + 1383457^2 .

It is not a de Polignac number, because 2005020817925 - 2⁴ = 2005020817909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40100416334 + ... + 40100416383.

It is an arithmetic number, because the mean of its divisors is an integer number (414370969043).

Almost surely, 2^{2005020817925} is an apocalyptic number.

2005020817925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2005020817925 is a deficient number, since it is larger than the sum of its proper divisors (481204996333).

2005020817925 is an equidigital number, since it uses as much as digits as its factorization.

2005020817925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80200832727 (or 80200832722 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 2005020817925 in words is "two trillion, five billion, twenty million, eight hundred seventeen thousand, nine hundred twenty-five".