20646460404222 has 16 divisors (see below), whose sum is σ = 41293059764880. Its totient is φ = 6882130308672.

The previous prime is 20646460404211. The next prime is 20646460404223. The reversal of 20646460404222 is 22240406464602.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20646460404223) 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, 3805993 + ... + 7468500.

It is an arithmetic number, because the mean of its divisors is an integer number (2580816235305).

Almost surely, 2^{20646460404222} is an apocalyptic number.

20646460404222 is an abundant number, since it is smaller than the sum of its proper divisors (20646599360658).

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

20646460404222 is a wasteful number, since it uses less digits than its factorization.

20646460404222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11579707.

The product of its (nonzero) digits is 884736, while the sum is 42.

Adding to 20646460404222 its reverse (22240406464602), we get a palindrome (42886866868824).

The spelling of 20646460404222 in words is "twenty trillion, six hundred forty-six billion, four hundred sixty million, four hundred four thousand, two hundred twenty-two".