21400302013 has 4 divisors (see below), whose sum is σ = 22090634368. Its totient is φ = 20709969660.

The previous prime is 21400301983. The next prime is 21400302023. The reversal of 21400302013 is 31020300412.

It is a happy number.

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 21400302013 - 2²⁵ = 21366747581 is a prime.

It is a super-2 number, since 2×21400302013² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400302023) 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, 345166131 + ... + 345166192.

It is an arithmetic number, because the mean of its divisors is an integer number (5522658592).

Almost surely, 2^21400302013 is an apocalyptic number.

It is an amenable number.

21400302013 is a deficient number, since it is larger than the sum of its proper divisors (690332355).

21400302013 is an equidigital number, since it uses as much as digits as its factorization.

21400302013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690332354.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21400302013 its reverse (31020300412), we get a palindrome (52420602425).

The spelling of 21400302013 in words is "twenty-one billion, four hundred million, three hundred two thousand, thirteen".