20556515150 has 48 divisors (see below), whose sum is σ = 41635393200. Its totient is φ = 7521212160.

The previous prime is 20556515137. The next prime is 20556515173. The reversal of 20556515150 is 5151565502.

It is a happy number.

It is a super-2 number, since 2×20556515150² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20556515150.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 345527 + ... + 400626.

It is an arithmetic number, because the mean of its divisors is an integer number (867404025).

Almost surely, 2^20556515150 is an apocalyptic number.

20556515150 is an abundant number, since it is smaller than the sum of its proper divisors (21078878050).

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

20556515150 is a wasteful number, since it uses less digits than its factorization.

20556515150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746213 (or 746208 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 35.

The spelling of 20556515150 in words is "twenty billion, five hundred fifty-six million, five hundred fifteen thousand, one hundred fifty".