20678488 has 32 divisors (see below), whose sum is σ = 40320000. Its totient is φ = 9931680.

The previous prime is 20678453. The next prime is 20678513. The reversal of 20678488 is 88487602.

It is a super-2 number, since 2×20678488² = 855199731932288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 49143 + ... + 49561.

It is an arithmetic number, because the mean of its divisors is an integer number (1260000).

Almost surely, 2^20678488 is an apocalyptic number.

It is an amenable number.

20678488 is a deficient number, since it is larger than the sum of its proper divisors (19641512).

20678488 is a wasteful number, since it uses less digits than its factorization.

20678488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 20678488 is about 4547.3605531121. The cubic root of 20678488 is about 274.4771907263.

The spelling of 20678488 in words is "twenty million, six hundred seventy-eight thousand, four hundred eighty-eight".