21412036025 has 6 divisors (see below), whose sum is σ = 26550924702. Its totient is φ = 17129628800.

The previous prime is 21412035991. The next prime is 21412036033. The reversal of 21412036025 is 52063021412.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 10394176 + 21401641849 = 3224^2 + 146293^2 .

It is not a de Polignac number, because 21412036025 - 2¹² = 21412031929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21412035985 and 21412036003.

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, 428240696 + ... + 428240745.

It is an arithmetic number, because the mean of its divisors is an integer number (4425154117).

Almost surely, 2^21412036025 is an apocalyptic number.

21412036025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21412036025 is a deficient number, since it is larger than the sum of its proper divisors (5138888677).

21412036025 is an equidigital number, since it uses as much as digits as its factorization.

21412036025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856481451 (or 856481446 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 21412036025 its reverse (52063021412), we get a palindrome (73475057437).

The spelling of 21412036025 in words is "twenty-one billion, four hundred twelve million, thirty-six thousand, twenty-five".