21632275642 has 16 divisors (see below), whose sum is σ = 32674752000. Its totient is φ = 10740730000.

The previous prime is 21632275619. The next prime is 21632275649. The reversal of 21632275642 is 24657223612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21632275595 and 21632275604.

It is not an unprimeable number, because it can be changed into a prime (21632275649) 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, 1566267 + ... + 1580017.

It is an arithmetic number, because the mean of its divisors is an integer number (2042172000).

Almost surely, 2^21632275642 is an apocalyptic number.

21632275642 is a deficient number, since it is larger than the sum of its proper divisors (11042476358).

21632275642 is a wasteful number, since it uses less digits than its factorization.

21632275642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19181.

The product of its digits is 241920, while the sum is 40.

The spelling of 21632275642 in words is "twenty-one billion, six hundred thirty-two million, two hundred seventy-five thousand, six hundred forty-two".