20488628 has 12 divisors (see below), whose sum is σ = 35999712. Its totient is φ = 10203000.

The previous prime is 20488627. The next prime is 20488649. The reversal of 20488628 is 82688402.

20488628 = T₂₇₂ + T₂₇₃ + ... + T₅₂₂.

It is a junction number, because it is equal to n+sod(n) for n = 20488591 and 20488600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20488627) 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 3 ways as a sum of consecutive naturals, for example, 9200 + ... + 11207.

It is an arithmetic number, because the mean of its divisors is an integer number (2999976).

Almost surely, 2^20488628 is an apocalyptic number.

It is an amenable number.

20488628 is a deficient number, since it is larger than the sum of its proper divisors (15511084).

20488628 is a wasteful number, since it uses less digits than its factorization.

20488628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20662 (or 20660 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 38.

The square root of 20488628 is about 4526.4365675441. The cubic root of 20488628 is about 273.6345670961.

The spelling of 20488628 in words is "twenty million, four hundred eighty-eight thousand, six hundred twenty-eight".