21400041325 has 24 divisors (see below), whose sum is σ = 28670505248. Its totient is φ = 15751558080.

The previous prime is 21400041301. The next prime is 21400041329. The reversal of 21400041325 is 52314000412.

It is not a de Polignac number, because 21400041325 - 2⁵ = 21400041293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21400041296 and 21400041305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400041329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7467 + ... + 207016.

Almost surely, 2^21400041325 is an apocalyptic number.

21400041325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21400041325 is a deficient number, since it is larger than the sum of its proper divisors (7270463923).

21400041325 is a wasteful number, since it uses less digits than its factorization.

21400041325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214813 (or 214808 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21400041325 its reverse (52314000412), we get a palindrome (73714041737).

The spelling of 21400041325 in words is "twenty-one billion, four hundred million, forty-one thousand, three hundred twenty-five".