21162650642506 has 8 divisors (see below), whose sum is σ = 31744052089920. Its totient is φ = 10581299945868.

The previous prime is 21162650642447. The next prime is 21162650642527. The reversal of 21162650642506 is 60524605626112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21162650642506² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11627496 + ... + 13323811.

It is an arithmetic number, because the mean of its divisors is an integer number (3968006511240).

Almost surely, 2^{21162650642506} is an apocalyptic number.

21162650642506 is a deficient number, since it is larger than the sum of its proper divisors (10581401447414).

21162650642506 is a wasteful number, since it uses less digits than its factorization.

21162650642506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25375388.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 21162650642506 in words is "twenty-one trillion, one hundred sixty-two billion, six hundred fifty million, six hundred forty-two thousand, five hundred six".