21400333013 has 4 divisors (see below), whose sum is σ = 22090666368. Its totient is φ = 20709999660.

The previous prime is 21400332979. The next prime is 21400333021. The reversal of 21400333013 is 31033300412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21400333013 - 2²⁰ = 21399284437 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 (21400333613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345166631 + ... + 345166692.

It is an arithmetic number, because the mean of its divisors is an integer number (5522666592).

Almost surely, 2^21400333013 is an apocalyptic number.

It is an amenable number.

21400333013 is a deficient number, since it is larger than the sum of its proper divisors (690333355).

21400333013 is an equidigital number, since it uses as much as digits as its factorization.

21400333013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690333354.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21400333013 its reverse (31033300412), we get a palindrome (52433633425).

The spelling of 21400333013 in words is "twenty-one billion, four hundred million, three hundred thirty-three thousand, thirteen".