20488580 has 24 divisors (see below), whose sum is σ = 49172928. Its totient is φ = 7024608.

The previous prime is 20488579. The next prime is 20488583. The reversal of 20488580 is 8588402.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 20488580.

It is not an unprimeable number, because it can be changed into a prime (20488583) 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, 73034 + ... + 73313.

It is an arithmetic number, because the mean of its divisors is an integer number (2048872).

Almost surely, 2^20488580 is an apocalyptic number.

20488580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20488580 is an abundant number, since it is smaller than the sum of its proper divisors (28684348).

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

20488580 is a wasteful number, since it uses less digits than its factorization.

20488580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146363 (or 146361 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 35.

The square root of 20488580 is about 4526.4312653568. The cubic root of 20488580 is about 273.6343534090.

The spelling of 20488580 in words is "twenty million, four hundred eighty-eight thousand, five hundred eighty".