21523466274 has 8 divisors (see below), whose sum is σ = 43046932560. Its totient is φ = 7174488756.

The previous prime is 21523466273. The next prime is 21523466281. The reversal of 21523466274 is 47266432512.

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

21523466274 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21523466273) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1793622184 + ... + 1793622195.

It is an arithmetic number, because the mean of its divisors is an integer number (5380866570).

Almost surely, 2^21523466274 is an apocalyptic number.

21523466274 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.

21523466274 is a wasteful number, since it uses less digits than its factorization.

21523466274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3587244384.

The product of its digits is 483840, while the sum is 42.

Adding to 21523466274 its reverse (47266432512), we get a palindrome (68789898786).

The spelling of 21523466274 in words is "twenty-one billion, five hundred twenty-three million, four hundred sixty-six thousand, two hundred seventy-four".