20663030550 has 24 divisors (see below), whose sum is σ = 51244316136. Its totient is φ = 5510141440.

The previous prime is 20663030543. The next prime is 20663030551. The reversal of 20663030550 is 5503036602.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20663030551) 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 11 ways as a sum of consecutive naturals, for example, 68876619 + ... + 68876918.

It is an arithmetic number, because the mean of its divisors is an integer number (2135179839).

Almost surely, 2^20663030550 is an apocalyptic number.

20663030550 is an abundant number, since it is smaller than the sum of its proper divisors (30581285586).

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

20663030550 is a wasteful number, since it uses less digits than its factorization.

20663030550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137753552 (or 137753547 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 30.

The spelling of 20663030550 in words is "twenty billion, six hundred sixty-three million, thirty thousand, five hundred fifty".