21010403413 has 4 divisors (see below), whose sum is σ = 21022613388. Its totient is φ = 20998193440.

The previous prime is 21010403389. The next prime is 21010403521. The reversal of 21010403413 is 31430401012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5335864209 + 15674539204 = 73047^2 + 125198^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21010403413 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 (21010473413) 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, 6102406 + ... + 6105847.

It is an arithmetic number, because the mean of its divisors is an integer number (5255653347).

Almost surely, 2^21010403413 is an apocalyptic number.

It is an amenable number.

21010403413 is a deficient number, since it is larger than the sum of its proper divisors (12209975).

21010403413 is a wasteful number, since it uses less digits than its factorization.

21010403413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12209974.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21010403413 its reverse (31430401012), we get a palindrome (52440804425).

The spelling of 21010403413 in words is "twenty-one billion, ten million, four hundred three thousand, four hundred thirteen".