20144290928 has 80 divisors (see below), whose sum is σ = 41201172480. Its totient is φ = 9522551808.

The previous prime is 20144290927. The next prime is 20144290931. The reversal of 20144290928 is 82909244102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144290927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15749393 + ... + 15750671.

It is an arithmetic number, because the mean of its divisors is an integer number (515014656).

Almost surely, 2^20144290928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20144290928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20600586240).

20144290928 is an abundant number, since it is smaller than the sum of its proper divisors (21056881552).

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

20144290928 is a wasteful number, since it uses less digits than its factorization.

20144290928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774 (or 1768 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 20144290928 in words is "twenty billion, one hundred forty-four million, two hundred ninety thousand, nine hundred twenty-eight".