21104750918 has 32 divisors (see below), whose sum is σ = 33286256640. Its totient is φ = 10016559520.

The previous prime is 21104750911. The next prime is 21104750959. The reversal of 21104750918 is 81905740112.

It is a super-2 number, since 2×21104750918² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104750911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5521448 + ... + 5525268.

It is an arithmetic number, because the mean of its divisors is an integer number (1040195520).

Almost surely, 2^21104750918 is an apocalyptic number.

21104750918 is a deficient number, since it is larger than the sum of its proper divisors (12181505722).

21104750918 is a wasteful number, since it uses less digits than its factorization.

21104750918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4732.

The product of its (nonzero) digits is 20160, while the sum is 38.

The spelling of 21104750918 in words is "twenty-one billion, one hundred four million, seven hundred fifty thousand, nine hundred eighteen".