21360152540425 has 12 divisors (see below), whose sum is σ = 26513533828800. Its totient is φ = 17070738368720.

The previous prime is 21360152540381. The next prime is 21360152540449. The reversal of 21360152540425 is 52404525106312.

It is a de Polignac number, because none of the positive numbers 2^k-21360152540425 is a prime.

It is a super-2 number, since 2×21360152540425² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 434566525 + ... + 434615674.

It is an arithmetic number, because the mean of its divisors is an integer number (2209461152400).

Almost surely, 2^{21360152540425} is an apocalyptic number.

21360152540425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21360152540425 is a deficient number, since it is larger than the sum of its proper divisors (5153381288375).

21360152540425 is an equidigital number, since it uses as much as digits as its factorization.

21360152540425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869183192 (or 869183187 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 21360152540425 its reverse (52404525106312), we get a palindrome (73764677646737).

The spelling of 21360152540425 in words is "twenty-one trillion, three hundred sixty billion, one hundred fifty-two million, five hundred forty thousand, four hundred twenty-five".