21650473676505 has 32 divisors (see below), whose sum is σ = 35318267669376. Its totient is φ = 11322911337984.

The previous prime is 21650473676497. The next prime is 21650473676509. The reversal of 21650473676505 is 50567637405612.

It is not a de Polignac number, because 21650473676505 - 2³ = 21650473676497 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 56955427 + ... + 57334296.

It is an arithmetic number, because the mean of its divisors is an integer number (1103695864668).

Almost surely, 2^{21650473676505} is an apocalyptic number.

It is an amenable number.

21650473676505 is a deficient number, since it is larger than the sum of its proper divisors (13667793992871).

21650473676505 is a wasteful number, since it uses less digits than its factorization.

21650473676505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114289977.

The product of its (nonzero) digits is 31752000, while the sum is 57.

The spelling of 21650473676505 in words is "twenty-one trillion, six hundred fifty billion, four hundred seventy-three million, six hundred seventy-six thousand, five hundred five".