21100676 has 12 divisors (see below), whose sum is σ = 37153872. Its totient is φ = 10485288.

The previous prime is 21100657. The next prime is 21100687. The reversal of 21100676 is 67600112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15530 + ... + 16833.

It is an arithmetic number, because the mean of its divisors is an integer number (3096156).

Almost surely, 2^21100676 is an apocalyptic number.

It is an amenable number.

21100676 is a deficient number, since it is larger than the sum of its proper divisors (16053196).

21100676 is a wasteful number, since it uses less digits than its factorization.

21100676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32530 (or 32528 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 21100676 is about 4593.5472132112. The cubic root of 21100676 is about 276.3325998025.

Adding to 21100676 its reverse (67600112), we get a palindrome (88700788).

The spelling of 21100676 in words is "twenty-one million, one hundred thousand, six hundred seventy-six".