21622164146 has 16 divisors (see below), whose sum is σ = 36523070208. Its totient is φ = 9511215600.

The previous prime is 21622164131. The next prime is 21622164149. The reversal of 21622164146 is 64146122612.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21622164149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15851345 + ... + 15852708.

It is an arithmetic number, because the mean of its divisors is an integer number (2282691888).

Almost surely, 2^21622164146 is an apocalyptic number.

21622164146 is a deficient number, since it is larger than the sum of its proper divisors (14900906062).

21622164146 is a wasteful number, since it uses less digits than its factorization.

21622164146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31704097.

The product of its digits is 27648, while the sum is 35.

Adding to 21622164146 its reverse (64146122612), we get a palindrome (85768286758).

The spelling of 21622164146 in words is "twenty-one billion, six hundred twenty-two million, one hundred sixty-four thousand, one hundred forty-six".