21659100136 has 32 divisors (see below), whose sum is σ = 41037684480. Its totient is φ = 10715848000.

The previous prime is 21659100131. The next prime is 21659100143. The reversal of 21659100136 is 63100195612.

It is not an unprimeable number, because it can be changed into a prime (21659100131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1504605 + ... + 1518931.

It is an arithmetic number, because the mean of its divisors is an integer number (1282427640).

Almost surely, 2^21659100136 is an apocalyptic number.

It is an amenable number.

21659100136 is a deficient number, since it is larger than the sum of its proper divisors (19378584344).

21659100136 is a wasteful number, since it uses less digits than its factorization.

21659100136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16305 (or 16301 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

Adding to 21659100136 its reverse (63100195612), we get a palindrome (84759295748).

The spelling of 21659100136 in words is "twenty-one billion, six hundred fifty-nine million, one hundred thousand, one hundred thirty-six".