20001002400325 has 12 divisors (see below), whose sum is σ = 24817212917028. Its totient is φ = 15990498732800.

The previous prime is 20001002400319. The next prime is 20001002400341. The reversal of 20001002400325 is 52300420010002.

It can be written as a sum of positive squares in 6 ways, for example, as 2896044957729 + 17104957442596 = 1701777^2 + 4135814^2 .

It is not a de Polignac number, because 20001002400325 - 2³³ = 19992412465733 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 11 ways as a sum of consecutive naturals, for example, 257540086 + ... + 257617735.

It is an arithmetic number, because the mean of its divisors is an integer number (2068101076419).

Almost surely, 2^{20001002400325} is an apocalyptic number.

20001002400325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20001002400325 is a deficient number, since it is larger than the sum of its proper divisors (4816210516703).

20001002400325 is a wasteful number, since it uses less digits than its factorization.

20001002400325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515159384 (or 515159379 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

Adding to 20001002400325 its reverse (52300420010002), we get a palindrome (72301422410327).

The spelling of 20001002400325 in words is "twenty trillion, one billion, two million, four hundred thousand, three hundred twenty-five".