20738481 has 8 divisors (see below), whose sum is σ = 29106720. Its totient is φ = 13097952.

The previous prime is 20738467. The next prime is 20738483. The reversal of 20738481 is 18483702.

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

It is not a de Polignac number, because 20738481 - 2¹⁹ = 20214193 is a prime.

It is a super-2 number, since 2×20738481² = 860169188374722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20738483) by changing a digit.

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, 181860 + ... + 181973.

It is an arithmetic number, because the mean of its divisors is an integer number (3638340).

Almost surely, 2^20738481 is an apocalyptic number.

It is an amenable number.

20738481 is a deficient number, since it is larger than the sum of its proper divisors (8368239).

20738481 is a wasteful number, since it uses less digits than its factorization.

20738481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363855.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 20738481 is about 4553.9522395388. The cubic root of 20738481 is about 274.7423747050.

The spelling of 20738481 in words is "twenty million, seven hundred thirty-eight thousand, four hundred eighty-one".