20481678 has 24 divisors (see below), whose sum is σ = 50716848. Its totient is φ = 5851872.

The previous prime is 20481667. The next prime is 20481679. The reversal of 20481678 is 87618402.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20481679) 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 11 ways as a sum of consecutive naturals, for example, 81151 + ... + 81402.

It is an arithmetic number, because the mean of its divisors is an integer number (2113202).

Almost surely, 2^20481678 is an apocalyptic number.

20481678 is an abundant number, since it is smaller than the sum of its proper divisors (30235170).

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

20481678 is a wasteful number, since it uses less digits than its factorization.

20481678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162568 (or 162565 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 20481678 is about 4525.6687903557. The cubic root of 20481678 is about 273.6036235028.

The spelling of 20481678 in words is "twenty million, four hundred eighty-one thousand, six hundred seventy-eight".