20135550550 has 48 divisors (see below), whose sum is σ = 39693365712. Its totient is φ = 7573145600.

The previous prime is 20135550521. The next prime is 20135550551. The reversal of 20135550550 is 5505553102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135550551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 916494 + ... + 938206.

It is an arithmetic number, because the mean of its divisors is an integer number (826945119).

Almost surely, 2^20135550550 is an apocalyptic number.

20135550550 is a deficient number, since it is larger than the sum of its proper divisors (19557815162).

20135550550 is a wasteful number, since it uses less digits than its factorization.

20135550550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22833 (or 22828 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 31.

The spelling of 20135550550 in words is "twenty billion, one hundred thirty-five million, five hundred fifty thousand, five hundred fifty".