21034342415207 has 8 divisors (see below), whose sum is σ = 22968141974400. Its totient is φ = 19104140624760.

The previous prime is 21034342415197. The next prime is 21034342415357. The reversal of 21034342415207 is 70251424343012.

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

It is a cyclic number.

It is not a de Polignac number, because 21034342415207 - 2³⁶ = 20965622938471 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 (21034342415407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899429957 + ... + 899453342.

It is an arithmetic number, because the mean of its divisors is an integer number (2871017746800).

Almost surely, 2^{21034342415207} is an apocalyptic number.

21034342415207 is a deficient number, since it is larger than the sum of its proper divisors (1933799559193).

21034342415207 is a wasteful number, since it uses less digits than its factorization.

21034342415207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798884373.

The product of its (nonzero) digits is 161280, while the sum is 38.

Adding to 21034342415207 its reverse (70251424343012), we get a palindrome (91285766758219).

The spelling of 21034342415207 in words is "twenty-one trillion, thirty-four billion, three hundred forty-two million, four hundred fifteen thousand, two hundred seven".