21466661322046 has 4 divisors (see below), whose sum is σ = 32199991983072. Its totient is φ = 10733330661022.

The previous prime is 21466661322031. The next prime is 21466661322049. The reversal of 21466661322046 is 64022316666412.

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

It is a super-2 number, since 2×21466661322046² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21466661322049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5366665330510 + ... + 5366665330513.

It is an arithmetic number, because the mean of its divisors is an integer number (8049997995768).

Almost surely, 2^{21466661322046} is an apocalyptic number.

21466661322046 is a deficient number, since it is larger than the sum of its proper divisors (10733330661026).

21466661322046 is a wasteful number, since it uses less digits than its factorization.

21466661322046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10733330661025.

The product of its (nonzero) digits is 2985984, while the sum is 49.

Adding to 21466661322046 its reverse (64022316666412), we get a palindrome (85488977988458).

The spelling of 21466661322046 in words is "twenty-one trillion, four hundred sixty-six billion, six hundred sixty-one million, three hundred twenty-two thousand, forty-six".