21365023651106 has 64 divisors (see below), whose sum is σ = 34729069731840. Its totient is φ = 9838501989120.

The previous prime is 21365023651079. The next prime is 21365023651109. The reversal of 21365023651106 is 60115632056312.

It is a super-2 number, since 2×21365023651106² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21365023651109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17173211 + ... + 18375233.

It is an arithmetic number, because the mean of its divisors is an integer number (542641714560).

Almost surely, 2^{21365023651106} is an apocalyptic number.

21365023651106 is a deficient number, since it is larger than the sum of its proper divisors (13364046080734).

21365023651106 is a wasteful number, since it uses less digits than its factorization.

21365023651106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202271.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 21365023651106 in words is "twenty-one trillion, three hundred sixty-five billion, twenty-three million, six hundred fifty-one thousand, one hundred six".