21265092106 has 16 divisors (see below), whose sum is σ = 35036308800. Its totient is φ = 9634984128.

The previous prime is 21265092059. The next prime is 21265092113. The reversal of 21265092106 is 60129056212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12164511 + ... + 12166258.

It is an arithmetic number, because the mean of its divisors is an integer number (2189769300).

Almost surely, 2^21265092106 is an apocalyptic number.

21265092106 is a deficient number, since it is larger than the sum of its proper divisors (13771216694).

21265092106 is a wasteful number, since it uses less digits than its factorization.

21265092106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24330813.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 21265092106 in words is "twenty-one billion, two hundred sixty-five million, ninety-two thousand, one hundred six".