20488040 has 32 divisors (see below), whose sum is σ = 46300680. Its totient is φ = 8159232.

The previous prime is 20488033. The next prime is 20488057. The reversal of 20488040 is 4088402.

It can be written as a sum of positive squares in 4 ways, for example, as 20484676 + 3364 = 4526^2 + 58^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9284 + ... + 11276.

Almost surely, 2^20488040 is an apocalyptic number.

20488040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20488040 is an abundant number, since it is smaller than the sum of its proper divisors (25812640).

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

20488040 is a wasteful number, since it uses less digits than its factorization.

20488040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261 (or 2257 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 20488040 is about 4526.3716153228. The cubic root of 20488040 is about 273.6319494056.

The spelling of 20488040 in words is "twenty million, four hundred eighty-eight thousand, forty".