21580953162 has 16 divisors (see below), whose sum is σ = 43411399200. Its totient is φ = 7152068912.

The previous prime is 21580953139. The next prime is 21580953167. The reversal of 21580953162 is 26135908512.

It is not an unprimeable number, because it can be changed into a prime (21580953167) 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, 10394412 + ... + 10396487.

It is an arithmetic number, because the mean of its divisors is an integer number (2713212450).

Almost surely, 2^21580953162 is an apocalyptic number.

21580953162 is an abundant number, since it is smaller than the sum of its proper divisors (21830446038).

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

21580953162 is a wasteful number, since it uses less digits than its factorization.

21580953162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20791077.

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 21580953162 in words is "twenty-one billion, five hundred eighty million, nine hundred fifty-three thousand, one hundred sixty-two".