20615506606 has 8 divisors (see below), whose sum is σ = 30924329760. Its totient is φ = 10307396688.

The previous prime is 20615506591. The next prime is 20615506607. The reversal of 20615506606 is 60660551602.

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

It is a super-2 number, since 2×20615506606² (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 (20615506607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98991 + ... + 225898.

It is an arithmetic number, because the mean of its divisors is an integer number (3865541220).

Almost surely, 2^20615506606 is an apocalyptic number.

20615506606 is a deficient number, since it is larger than the sum of its proper divisors (10308823154).

20615506606 is a wasteful number, since it uses less digits than its factorization.

20615506606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356618.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 20615506606 in words is "twenty billion, six hundred fifteen million, five hundred six thousand, six hundred six".