21413242401 has 16 divisors (see below), whose sum is σ = 29827949760. Its totient is φ = 13646763200.

The previous prime is 21413242393. The next prime is 21413242423. The reversal of 21413242401 is 10424231412.

It is a cyclic number.

It is not a de Polignac number, because 21413242401 - 2³ = 21413242393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21413242451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1209675 + ... + 1227248.

It is an arithmetic number, because the mean of its divisors is an integer number (1864246860).

Almost surely, 2^21413242401 is an apocalyptic number.

It is an amenable number.

21413242401 is a deficient number, since it is larger than the sum of its proper divisors (8414707359).

21413242401 is a wasteful number, since it uses less digits than its factorization.

21413242401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437056.

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

Adding to 21413242401 its reverse (10424231412), we get a palindrome (31837473813).

The spelling of 21413242401 in words is "twenty-one billion, four hundred thirteen million, two hundred forty-two thousand, four hundred one".