20481603 has 4 divisors (see below), whose sum is σ = 27308808. Its totient is φ = 13654400.

The previous prime is 20481599. The next prime is 20481623. The reversal of 20481603 is 30618402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20481603 - 2² = 20481599 is a prime.

It is a super-2 number, since 2×20481603² = 838992122899218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20481623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3413598 + ... + 3413603.

It is an arithmetic number, because the mean of its divisors is an integer number (6827202).

Almost surely, 2^20481603 is an apocalyptic number.

20481603 is a deficient number, since it is larger than the sum of its proper divisors (6827205).

20481603 is an equidigital number, since it uses as much as digits as its factorization.

20481603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6827204.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20481603 is about 4525.6605042800. The cubic root of 20481603 is about 273.6032895410.

The spelling of 20481603 in words is "twenty million, four hundred eighty-one thousand, six hundred three".