20213640606 has 8 divisors (see below), whose sum is σ = 40427281224. Its totient is φ = 6737880200.

The previous prime is 20213640593. The next prime is 20213640647. The reversal of 20213640606 is 60604631202.

It is a sphenic number, since it is the product of 3 distinct primes.

20213640606 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1684470045 + ... + 1684470056.

It is an arithmetic number, because the mean of its divisors is an integer number (5053410153).

Almost surely, 2^20213640606 is an apocalyptic number.

20213640606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20213640606 is a wasteful number, since it uses less digits than its factorization.

20213640606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368940106.

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 20213640606 in words is "twenty billion, two hundred thirteen million, six hundred forty thousand, six hundred six".