20481121 has 8 divisors (see below), whose sum is σ = 20749824. Its totient is φ = 20214480.

The previous prime is 20481079. The next prime is 20481193. The reversal of 20481121 is 12118402.

It is a happy number.

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 20481121 - 2⁹ = 20480609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20485121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29646 + ... + 30328.

It is an arithmetic number, because the mean of its divisors is an integer number (2593728).

Almost surely, 2^20481121 is an apocalyptic number.

It is an amenable number.

20481121 is a deficient number, since it is larger than the sum of its proper divisors (268703).

20481121 is a wasteful number, since it uses less digits than its factorization.

20481121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 20481121 is about 4525.6072520713. The cubic root of 20481121 is about 273.6011432601.

Adding to 20481121 its reverse (12118402), we get a palindrome (32599523).

It can be divided in two parts, 20481 and 121, that added together give a palindrome (20602).

The spelling of 20481121 in words is "twenty million, four hundred eighty-one thousand, one hundred twenty-one".