21232465407 has 12 divisors (see below), whose sum is σ = 30693112320. Its totient is φ = 14143902048.

The previous prime is 21232465357. The next prime is 21232465427. The reversal of 21232465407 is 70456423212.

21232465407 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 246 + 5 + 407 = 666.

It is not a de Polignac number, because 21232465407 - 2⁷ = 21232465279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232465427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 910758 + ... + 933779.

It is an arithmetic number, because the mean of its divisors is an integer number (2557759360).

Almost surely, 2^21232465407 is an apocalyptic number.

21232465407 is a deficient number, since it is larger than the sum of its proper divisors (9460646913).

21232465407 is a wasteful number, since it uses less digits than its factorization.

21232465407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845822 (or 1845819 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

Adding to 21232465407 its reverse (70456423212), we get a palindrome (91688888619).

The spelling of 21232465407 in words is "twenty-one billion, two hundred thirty-two million, four hundred sixty-five thousand, four hundred seven".