21083608106 has 32 divisors (see below), whose sum is σ = 35139806208. Its totient is φ = 9406877040.

The previous prime is 21083608103. The next prime is 21083608109. The reversal of 21083608106 is 60180638012.

It is an interprime number because it is at equal distance from previous prime (21083608103) and next prime (21083608109).

It is not an unprimeable number, because it can be changed into a prime (21083608103) 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, 391871 + ... + 442413.

It is an arithmetic number, because the mean of its divisors is an integer number (1098118944).

Almost surely, 2^21083608106 is an apocalyptic number.

21083608106 is a deficient number, since it is larger than the sum of its proper divisors (14056198102).

21083608106 is a wasteful number, since it uses less digits than its factorization.

21083608106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50906.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 21083608106 in words is "twenty-one billion, eighty-three million, six hundred eight thousand, one hundred six".