21457761422 has 8 divisors (see below), whose sum is σ = 32471480016. Its totient is φ = 10633934752.

The previous prime is 21457761421. The next prime is 21457761431. The reversal of 21457761422 is 22416775412.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21457761422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21457761421) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 47472698 + ... + 47473149.

It is an arithmetic number, because the mean of its divisors is an integer number (4058935002).

Almost surely, 2^21457761422 is an apocalyptic number.

21457761422 is a deficient number, since it is larger than the sum of its proper divisors (11013718594).

21457761422 is a wasteful number, since it uses less digits than its factorization.

21457761422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94945962.

The product of its digits is 188160, while the sum is 41.

The spelling of 21457761422 in words is "twenty-one billion, four hundred fifty-seven million, seven hundred sixty-one thousand, four hundred twenty-two".