21106536675 has 24 divisors (see below), whose sum is σ = 39881304576. Its totient is φ = 9648702240.

The previous prime is 21106536613. The next prime is 21106536679. The reversal of 21106536675 is 57663560112.

It is not a de Polignac number, because 21106536675 - 2⁶ = 21106536611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21106536679) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20100939 + ... + 20101988.

It is an arithmetic number, because the mean of its divisors is an integer number (1661721024).

Almost surely, 2^21106536675 is an apocalyptic number.

21106536675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21106536675 is a deficient number, since it is larger than the sum of its proper divisors (18774767901).

21106536675 is a wasteful number, since it uses less digits than its factorization.

21106536675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40202947 (or 40202942 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 21106536675 in words is "twenty-one billion, one hundred six million, five hundred thirty-six thousand, six hundred seventy-five".