21341003245 has 4 divisors (see below), whose sum is σ = 25609203900. Its totient is φ = 17072802592.

The previous prime is 21341003239. The next prime is 21341003263. The reversal of 21341003245 is 54230014312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12831678729 + 8509324516 = 113277^2 + 92246^2 .

It is a cyclic number.

It is not a de Polignac number, because 21341003245 - 2²³ = 21332614637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2134100320 + ... + 2134100329.

It is an arithmetic number, because the mean of its divisors is an integer number (6402300975).

Almost surely, 2^21341003245 is an apocalyptic number.

It is an amenable number.

21341003245 is a deficient number, since it is larger than the sum of its proper divisors (4268200655).

21341003245 is an equidigital number, since it uses as much as digits as its factorization.

21341003245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4268200654.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 21341003245 its reverse (54230014312), we get a palindrome (75571017557).

The spelling of 21341003245 in words is "twenty-one billion, three hundred forty-one million, three thousand, two hundred forty-five".