21118257677334 has 16 divisors (see below), whose sum is σ = 42241643111088. Its totient is φ = 7038564599712.

The previous prime is 21118257677323. The next prime is 21118257677347. The reversal of 21118257677334 is 43377675281112.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 213602977 + ... + 213701820.

It is an arithmetic number, because the mean of its divisors is an integer number (2640102694443).

Almost surely, 2^{21118257677334} is an apocalyptic number.

21118257677334 is an abundant number, since it is smaller than the sum of its proper divisors (21123385433754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21118257677334 is a wasteful number, since it uses less digits than its factorization.

21118257677334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427313039.

The product of its digits is 11854080, while the sum is 57.

The spelling of 21118257677334 in words is "twenty-one trillion, one hundred eighteen billion, two hundred fifty-seven million, six hundred seventy-seven thousand, three hundred thirty-four".