20512245550 has 24 divisors (see below), whose sum is σ = 38159361216. Its totient is φ = 8203482240.

The previous prime is 20512245529. The next prime is 20512245583. The reversal of 20512245550 is 5554221502.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 286134 + ... + 350566.

It is an arithmetic number, because the mean of its divisors is an integer number (1589973384).

Almost surely, 2^20512245550 is an apocalyptic number.

20512245550 is a deficient number, since it is larger than the sum of its proper divisors (17647115666).

20512245550 is a wasteful number, since it uses less digits than its factorization.

20512245550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70812 (or 70807 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 31.

The spelling of 20512245550 in words is "twenty billion, five hundred twelve million, two hundred forty-five thousand, five hundred fifty".