20420488 has 16 divisors (see below), whose sum is σ = 41769360. Its totient is φ = 9282000.

The previous prime is 20420479. The next prime is 20420503. The reversal of 20420488 is 88402402.

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 3 ways as a sum of consecutive naturals, for example, 115938 + ... + 116113.

It is an arithmetic number, because the mean of its divisors is an integer number (2610585).

Almost surely, 2^20420488 is an apocalyptic number.

It is an amenable number.

20420488 is an abundant number, since it is smaller than the sum of its proper divisors (21348872).

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

20420488 is a wasteful number, since it uses less digits than its factorization.

20420488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232068 (or 232064 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 20420488 is about 4518.9034068013. The cubic root of 20420488 is about 273.3308837113.

The spelling of 20420488 in words is "twenty million, four hundred twenty thousand, four hundred eighty-eight".