21613006706 has 16 divisors (see below), whose sum is σ = 32478706944. Its totient is φ = 10786790784.

The previous prime is 21613006703. The next prime is 21613006717. The reversal of 21613006706 is 60760031612.

It is not an unprimeable number, because it can be changed into a prime (21613006703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2919746 + ... + 2927138.

It is an arithmetic number, because the mean of its divisors is an integer number (2029919184).

Almost surely, 2^21613006706 is an apocalyptic number.

21613006706 is a deficient number, since it is larger than the sum of its proper divisors (10865700238).

21613006706 is a wasteful number, since it uses less digits than its factorization.

21613006706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9865.

The product of its (nonzero) digits is 9072, while the sum is 32.

The spelling of 21613006706 in words is "twenty-one billion, six hundred thirteen million, six thousand, seven hundred six".