21424760450207 has 4 divisors (see below), whose sum is σ = 21621317885640. Its totient is φ = 21228203014776.

The previous prime is 21424760450179. The next prime is 21424760450227. The reversal of 21424760450207 is 70205406742412.

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

It is a cyclic number.

It is not a de Polignac number, because 21424760450207 - 2⁸ = 21424760449951 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 (21424760450227) 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, 98278717553 + ... + 98278717770.

It is an arithmetic number, because the mean of its divisors is an integer number (5405329471410).

Almost surely, 2^{21424760450207} is an apocalyptic number.

21424760450207 is a deficient number, since it is larger than the sum of its proper divisors (196557435433).

21424760450207 is a wasteful number, since it uses less digits than its factorization.

21424760450207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196557435432.

The product of its (nonzero) digits is 752640, while the sum is 44.

The spelling of 21424760450207 in words is "twenty-one trillion, four hundred twenty-four billion, seven hundred sixty million, four hundred fifty thousand, two hundred seven".