20754481 has 8 divisors (see below), whose sum is σ = 22674528. Its totient is φ = 18840000.

The previous prime is 20754473. The next prime is 20754511. The reversal of 20754481 is 18445702.

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

It is a cyclic number.

It is not a de Polignac number, because 20754481 - 2³ = 20754473 is a prime.

It is a super-2 number, since 2×20754481² = 861496963158722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20754421) 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 7 ways as a sum of consecutive naturals, for example, 12426 + ... + 13996.

It is an arithmetic number, because the mean of its divisors is an integer number (2834316).

Almost surely, 2^20754481 is an apocalyptic number.

It is an amenable number.

20754481 is a deficient number, since it is larger than the sum of its proper divisors (1920047).

20754481 is a wasteful number, since it uses less digits than its factorization.

20754481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 20754481 is about 4555.7086166699. The cubic root of 20754481 is about 274.8130122795.

It can be divided in two parts, 2075 and 4481, that added together give a palindrome (6556).

The spelling of 20754481 in words is "twenty million, seven hundred fifty-four thousand, four hundred eighty-one".