20481806 has 8 divisors (see below), whose sum is σ = 30758184. Its totient is φ = 10229080.

The previous prime is 20481767. The next prime is 20481817. The reversal of 20481806 is 60818402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 3560 + ... + 7323.

It is an arithmetic number, because the mean of its divisors is an integer number (3844773).

Almost surely, 2^20481806 is an apocalyptic number.

20481806 is a deficient number, since it is larger than the sum of its proper divisors (10276378).

20481806 is a wasteful number, since it uses less digits than its factorization.

20481806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11826.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 20481806 is about 4525.6829318899. The cubic root of 20481806 is about 273.6041934625.

The spelling of 20481806 in words is "twenty million, four hundred eighty-one thousand, eight hundred six".