20103481 has 4 divisors (see below), whose sum is σ = 20291472. Its totient is φ = 19915492.

The previous prime is 20103443. The next prime is 20103487. The reversal of 20103481 is 18430102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18430102 = 2 ⋅9215051.

It is a cyclic number.

It is not a de Polignac number, because 20103481 - 2⁷ = 20103353 is a prime.

It is a super-2 number, since 2×20103481² = 808299896634722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20103487) 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 3 ways as a sum of consecutive naturals, for example, 93835 + ... + 94048.

It is an arithmetic number, because the mean of its divisors is an integer number (5072868).

Almost surely, 2^20103481 is an apocalyptic number.

It is an amenable number.

20103481 is a deficient number, since it is larger than the sum of its proper divisors (187991).

20103481 is a wasteful number, since it uses less digits than its factorization.

20103481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187990.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 20103481 is about 4483.6905557810. The cubic root of 20103481 is about 271.9091076423.

Adding to 20103481 its reverse (18430102), we get a palindrome (38533583).

The spelling of 20103481 in words is "twenty million, one hundred three thousand, four hundred eighty-one".