21012442413 has 32 divisors (see below), whose sum is σ = 29765345280. Its totient is φ = 13161890880.

The previous prime is 21012442411. The next prime is 21012442433. The reversal of 21012442413 is 31424421012.

It is not a de Polignac number, because 21012442413 - 2¹ = 21012442411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012442411) 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 31 ways as a sum of consecutive naturals, for example, 1669498 + ... + 1682036.

It is an arithmetic number, because the mean of its divisors is an integer number (930167040).

Almost surely, 2^21012442413 is an apocalyptic number.

It is an amenable number.

21012442413 is a deficient number, since it is larger than the sum of its proper divisors (8752902867).

21012442413 is a wasteful number, since it uses less digits than its factorization.

21012442413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13097.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21012442413 its reverse (31424421012), we get a palindrome (52436863425).

The spelling of 21012442413 in words is "twenty-one billion, twelve million, four hundred forty-two thousand, four hundred thirteen".