21214002513 has 32 divisors (see below), whose sum is σ = 31388562432. Its totient is φ = 12635726400.

The previous prime is 21214002487. The next prime is 21214002521. The reversal of 21214002513 is 31520041212.

It is not a de Polignac number, because 21214002513 - 2⁹ = 21214002001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21214002513.

It is not an unprimeable number, because it can be changed into a prime (21214002583) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2909170 + ... + 2916452.

It is an arithmetic number, because the mean of its divisors is an integer number (980892576).

Almost surely, 2^21214002513 is an apocalyptic number.

It is an amenable number.

21214002513 is a deficient number, since it is larger than the sum of its proper divisors (10174559919).

21214002513 is a wasteful number, since it uses less digits than its factorization.

21214002513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8805.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21214002513 its reverse (31520041212), we get a palindrome (52734043725).

The spelling of 21214002513 in words is "twenty-one billion, two hundred fourteen million, two thousand, five hundred thirteen".