20281488 has 40 divisors (see below), whose sum is σ = 52559136. Its totient is φ = 6739200.

The previous prime is 20281477. The next prime is 20281489. The reversal of 20281488 is 88418202.

It is a super-2 number, since 2×20281488² = 822677510988288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20281489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24603 + ... + 25413.

Almost surely, 2^20281488 is an apocalyptic number.

It is an amenable number.

20281488 is an abundant number, since it is smaller than the sum of its proper divisors (32277648).

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

20281488 is a wasteful number, since it uses less digits than its factorization.

20281488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 1337 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 20281488 is about 4503.4973076488. The cubic root of 20281488 is about 272.7092935218.

The spelling of 20281488 in words is "twenty million, two hundred eighty-one thousand, four hundred eighty-eight".