20129911152 has 80 divisors (see below), whose sum is σ = 58949976960. Its totient is φ = 5867824896.

The previous prime is 20129911147. The next prime is 20129911159. The reversal of 20129911152 is 25111992102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20129911159) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 837078 + ... + 860789.

It is an arithmetic number, because the mean of its divisors is an integer number (736874712).

Almost surely, 2^20129911152 is an apocalyptic number.

It is an amenable number.

20129911152 is an abundant number, since it is smaller than the sum of its proper divisors (38820065808).

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

20129911152 is a wasteful number, since it uses less digits than its factorization.

20129911152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697910 (or 1697904 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 33.

The spelling of 20129911152 in words is "twenty billion, one hundred twenty-nine million, nine hundred eleven thousand, one hundred fifty-two".