21676428814 has 4 divisors (see below), whose sum is σ = 32514643224. Its totient is φ = 10838214406.

The previous prime is 21676428803. The next prime is 21676428857. The reversal of 21676428814 is 41882467612.

It is a happy number.

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

It is a super-2 number, since 2×21676428814² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5419107202 + ... + 5419107205.

It is an arithmetic number, because the mean of its divisors is an integer number (8128660806).

Almost surely, 2^21676428814 is an apocalyptic number.

21676428814 is a deficient number, since it is larger than the sum of its proper divisors (10838214410).

21676428814 is a wasteful number, since it uses less digits than its factorization.

21676428814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10838214409.

The product of its digits is 1032192, while the sum is 49.

The spelling of 21676428814 in words is "twenty-one billion, six hundred seventy-six million, four hundred twenty-eight thousand, eight hundred fourteen".