21210352413 has 8 divisors (see below), whose sum is σ = 29944027008. Its totient is φ = 13308456384.

The previous prime is 21210352409. The next prime is 21210352469. The reversal of 21210352413 is 31425301212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21210352413 - 2² = 21210352409 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210352483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207944581 + ... + 207944682.

It is an arithmetic number, because the mean of its divisors is an integer number (3743003376).

Almost surely, 2^21210352413 is an apocalyptic number.

It is an amenable number.

21210352413 is a deficient number, since it is larger than the sum of its proper divisors (8733674595).

21210352413 is a wasteful number, since it uses less digits than its factorization.

21210352413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415889283.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 21210352413 its reverse (31425301212), we get a palindrome (52635653625).

The spelling of 21210352413 in words is "twenty-one billion, two hundred ten million, three hundred fifty-two thousand, four hundred thirteen".