21071084358207 has 16 divisors (see below), whose sum is σ = 30260196481760. Its totient is φ = 12964986652032.

The previous prime is 21071084358131. The next prime is 21071084358241. The reversal of 21071084358207 is 70285348017012.

It is not a de Polignac number, because 21071084358207 - 2⁸ = 21071084357951 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 (21071084358607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37939348 + ... + 38490729.

It is an arithmetic number, because the mean of its divisors is an integer number (1891262280110).

Almost surely, 2^{21071084358207} is an apocalyptic number.

21071084358207 is a deficient number, since it is larger than the sum of its proper divisors (9189112123553).

21071084358207 is a wasteful number, since it uses less digits than its factorization.

21071084358207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76437162.

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 21071084358207 in words is "twenty-one trillion, seventy-one billion, eighty-four million, three hundred fifty-eight thousand, two hundred seven".