21130325045 has 8 divisors (see below), whose sum is σ = 25424371896. Its totient is φ = 16858938816.

The previous prime is 21130325033. The next prime is 21130325057. The reversal of 21130325045 is 54052303112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21130325033) and next prime (21130325057).

It can be written as a sum of positive squares in 4 ways, for example, as 8645838289 + 12484486756 = 92983^2 + 111734^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21130325045 - 2¹⁰ = 21130324021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5663102 + ... + 5666831.

It is an arithmetic number, because the mean of its divisors is an integer number (3178046487).

Almost surely, 2^21130325045 is an apocalyptic number.

It is an amenable number.

21130325045 is a deficient number, since it is larger than the sum of its proper divisors (4294046851).

21130325045 is a wasteful number, since it uses less digits than its factorization.

21130325045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11330311.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 21130325045 its reverse (54052303112), we get a palindrome (75182628157).

The spelling of 21130325045 in words is "twenty-one billion, one hundred thirty million, three hundred twenty-five thousand, forty-five".