20093481 has 8 divisors (see below), whose sum is σ = 29768160. Its totient is φ = 13395636.

The previous prime is 20093477. The next prime is 20093483. The reversal of 20093481 is 18439002.

It is not a de Polignac number, because 20093481 - 2² = 20093477 is a prime.

It is a super-2 number, since 2×20093481² = 807495957394722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 744203 = 20093481 / (2 + 0 + 0 + 9 + 3 + 4 + 8 + 1).

It is not an unprimeable number, because it can be changed into a prime (20093483) 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, 372075 + ... + 372128.

It is an arithmetic number, because the mean of its divisors is an integer number (3721020).

Almost surely, 2^20093481 is an apocalyptic number.

It is an amenable number.

20093481 is a deficient number, since it is larger than the sum of its proper divisors (9674679).

20093481 is an equidigital number, since it uses as much as digits as its factorization.

20093481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744212 (or 744206 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20093481 is about 4482.5752642873. The cubic root of 20093481 is about 271.8640152518.

The spelling of 20093481 in words is "twenty million, ninety-three thousand, four hundred eighty-one".