25341340521 has 16 divisors (see below), whose sum is σ = 39191727104. Its totient is φ = 14264634384.

The previous prime is 25341340487. The next prime is 25341340529. The reversal of 25341340521 is 12504314352.

It is not a de Polignac number, because 25341340521 - 2³³ = 16751405929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25341340529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9004045 + ... + 9006858.

It is an arithmetic number, because the mean of its divisors is an integer number (2449482944).

Almost surely, 2^25341340521 is an apocalyptic number.

25341340521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25341340521 is a deficient number, since it is larger than the sum of its proper divisors (13850386583).

25341340521 is a wasteful number, since it uses less digits than its factorization.

25341340521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18010980.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 25341340521 its reverse (12504314352), we get a palindrome (37845654873).

The spelling of 25341340521 in words is "twenty-five billion, three hundred forty-one million, three hundred forty thousand, five hundred twenty-one".