21632973220442 has 32 divisors (see below), whose sum is σ = 34225377439680. Its totient is φ = 10226801422080.

The previous prime is 21632973220429. The next prime is 21632973220447. The reversal of 21632973220442 is 24402237923612.

It is not an unprimeable number, because it can be changed into a prime (21632973220447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40956833 + ... + 41481659.

It is an arithmetic number, because the mean of its divisors is an integer number (1069543044990).

Almost surely, 2^{21632973220442} is an apocalyptic number.

21632973220442 is a deficient number, since it is larger than the sum of its proper divisors (12592404219238).

21632973220442 is a wasteful number, since it uses less digits than its factorization.

21632973220442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527006.

The product of its (nonzero) digits is 1741824, while the sum is 47.

The spelling of 21632973220442 in words is "twenty-one trillion, six hundred thirty-two billion, nine hundred seventy-three million, two hundred twenty thousand, four hundred forty-two".