20155630056 has 32 divisors (see below), whose sum is σ = 50392586400. Its totient is φ = 6718075200.

The previous prime is 20155630031. The next prime is 20155630057. The reversal of 20155630056 is 65003655102.

It is a junction number, because it is equal to n+sod(n) for n = 20155629999 and 20155630026.

It is not an unprimeable number, because it can be changed into a prime (20155630057) 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, 588606 + ... + 621906.

It is an arithmetic number, because the mean of its divisors is an integer number (1574768325).

Almost surely, 2^20155630056 is an apocalyptic number.

It is an amenable number.

20155630056 is an abundant number, since it is smaller than the sum of its proper divisors (30236956344).

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

20155630056 is a wasteful number, since it uses less digits than its factorization.

20155630056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58529 (or 58525 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The spelling of 20155630056 in words is "twenty billion, one hundred fifty-five million, six hundred thirty thousand, fifty-six".