21052000213 has 8 divisors (see below), whose sum is σ = 21109195800. Its totient is φ = 20994877440.

The previous prime is 21052000183. The next prime is 21052000219. The reversal of 21052000213 is 31200025012.

It can be written as a sum of positive squares in 4 ways, for example, as 12936332644 + 8115667569 = 113738^2 + 90087^2 .

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 21052000213 - 2⁵ = 21052000181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21052000219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587883 + ... + 622663.

It is an arithmetic number, because the mean of its divisors is an integer number (2638649475).

Almost surely, 2^21052000213 is an apocalyptic number.

It is an amenable number.

21052000213 is a deficient number, since it is larger than the sum of its proper divisors (57195587).

21052000213 is a wasteful number, since it uses less digits than its factorization.

21052000213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36407.

The product of its (nonzero) digits is 120, while the sum is 16.

Adding to 21052000213 its reverse (31200025012), we get a palindrome (52252025225).

The spelling of 21052000213 in words is "twenty-one billion, fifty-two million, two hundred thirteen", and thus it is an aban number.