20555323250 has 128 divisors (see below), whose sum is σ = 49630164480. Its totient is φ = 6185760000.

The previous prime is 20555323219. The next prime is 20555323277. The reversal of 20555323250 is 5232355502.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 539840 + ... + 576660.

It is an arithmetic number, because the mean of its divisors is an integer number (387735660).

Almost surely, 2^20555323250 is an apocalyptic number.

20555323250 is an abundant number, since it is smaller than the sum of its proper divisors (29074841230).

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

20555323250 is a wasteful number, since it uses less digits than its factorization.

20555323250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36885 (or 36875 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 32.

Adding to 20555323250 its reverse (5232355502), we get a palindrome (25787678752).

The spelling of 20555323250 in words is "twenty billion, five hundred fifty-five million, three hundred twenty-three thousand, two hundred fifty".