21727376994 has 8 divisors (see below), whose sum is σ = 43454754000. Its totient is φ = 7242458996.

The previous prime is 21727376989. The next prime is 21727377029. The reversal of 21727376994 is 49967372712.

It is a happy number.

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

21727376994 is an admirable number.

It is a super-2 number, since 2×21727376994² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1810614744 + ... + 1810614755.

It is an arithmetic number, because the mean of its divisors is an integer number (5431844250).

Almost surely, 2^21727376994 is an apocalyptic number.

21727376994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21727376994 is a wasteful number, since it uses less digits than its factorization.

21727376994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3621229504.

The product of its digits is 8001504, while the sum is 57.

The spelling of 21727376994 in words is "twenty-one billion, seven hundred twenty-seven million, three hundred seventy-six thousand, nine hundred ninety-four".