20606015640056 has 64 divisors (see below), whose sum is σ = 48398200392960. Its totient is φ = 7990268832000.

The previous prime is 20606015640053. The next prime is 20606015640061. The reversal of 20606015640056 is 65004651060602.

It is a junction number, because it is equal to n+sod(n) for n = 20606015639995 and 20606015640022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20606015640053) 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, 79138565 + ... + 79398516.

It is an arithmetic number, because the mean of its divisors is an integer number (756221881140).

Almost surely, 2^{20606015640056} is an apocalyptic number.

It is an amenable number.

20606015640056 is an abundant number, since it is smaller than the sum of its proper divisors (27792184752904).

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

20606015640056 is a wasteful number, since it uses less digits than its factorization.

20606015640056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158537316 (or 158537312 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 20606015640056 in words is "twenty trillion, six hundred six billion, fifteen million, six hundred forty thousand, fifty-six".