21325351045 has 8 divisors (see below), whose sum is σ = 25611456024. Its totient is φ = 17046257664.

The previous prime is 21325351027. The next prime is 21325351051. The reversal of 21325351045 is 54015352312.

It can be written as a sum of positive squares in 4 ways, for example, as 561405636 + 20763945409 = 23694^2 + 144097^2 .

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 21325351045 - 2⁹ = 21325350533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21325350998 and 21325351016.

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, 1746204 + ... + 1758373.

It is an arithmetic number, because the mean of its divisors is an integer number (3201432003).

Almost surely, 2^21325351045 is an apocalyptic number.

It is an amenable number.

21325351045 is a deficient number, since it is larger than the sum of its proper divisors (4286104979).

21325351045 is a wasteful number, since it uses less digits than its factorization.

21325351045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3505799.

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 21325351045 in words is "twenty-one billion, three hundred twenty-five million, three hundred fifty-one thousand, forty-five".