21650473676506 has 16 divisors (see below), whose sum is σ = 32616394784064. Its totient is φ = 10778345796064.

The previous prime is 21650473676497. The next prime is 21650473676509. The reversal of 21650473676506 is 60567637405612.

It is not an unprimeable number, because it can be changed into a prime (21650473676509) 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, 10905261 + ... + 12736783.

It is an arithmetic number, because the mean of its divisors is an integer number (2038524674004).

Almost surely, 2^{21650473676506} is an apocalyptic number.

21650473676506 is a deficient number, since it is larger than the sum of its proper divisors (10965921107558).

21650473676506 is a wasteful number, since it uses less digits than its factorization.

21650473676506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857125.

The product of its (nonzero) digits is 38102400, while the sum is 58.

The spelling of 21650473676506 in words is "twenty-one trillion, six hundred fifty billion, four hundred seventy-three million, six hundred seventy-six thousand, five hundred six".