20144966508 has 18 divisors (see below), whose sum is σ = 50921998764. Its totient is φ = 6714988824.

The previous prime is 20144966503. The next prime is 20144966531. The reversal of 20144966508 is 80566944102.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (20144966503) 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 5 ways as a sum of consecutive naturals, for example, 279791166 + ... + 279791237.

Almost surely, 2^20144966508 is an apocalyptic number.

It is an amenable number.

20144966508 is an abundant number, since it is smaller than the sum of its proper divisors (30777032256).

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

20144966508 is a wasteful number, since it uses less digits than its factorization.

20144966508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559582413 (or 559582408 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 20144966508 in words is "twenty billion, one hundred forty-four million, nine hundred sixty-six thousand, five hundred eight".