20115488 has 48 divisors (see below), whose sum is σ = 42456960. Its totient is φ = 9348096.

The previous prime is 20115481. The next prime is 20115493. The reversal of 20115488 is 88451102.

It is a self number, because there is not a number n which added to its sum of digits gives 20115488.

It is not an unprimeable number, because it can be changed into a prime (20115481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55853 + ... + 56211.

It is an arithmetic number, because the mean of its divisors is an integer number (884520).

Almost surely, 2^20115488 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 20115488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21228480).

20115488 is an abundant number, since it is smaller than the sum of its proper divisors (22341472).

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

20115488 is a wasteful number, since it uses less digits than its factorization.

20115488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 20115488 is about 4485.0293198596. The cubic root of 20115488 is about 271.9632303237.

The spelling of 20115488 in words is "twenty million, one hundred fifteen thousand, four hundred eighty-eight".