21166500602 has 32 divisors (see below), whose sum is σ = 35311610880. Its totient is φ = 9449573760.

The previous prime is 21166500601. The next prime is 21166500683. The reversal of 21166500602 is 20600566112.

It is not an unprimeable number, because it can be changed into a prime (21166500601) 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, 2194763 + ... + 2204385.

It is an arithmetic number, because the mean of its divisors is an integer number (1103487840).

Almost surely, 2^21166500602 is an apocalyptic number.

21166500602 is a deficient number, since it is larger than the sum of its proper divisors (14145110278).

21166500602 is a wasteful number, since it uses less digits than its factorization.

21166500602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12398.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 21166500602 in words is "twenty-one billion, one hundred sixty-six million, five hundred thousand, six hundred two".