20481827 has 4 divisors (see below), whose sum is σ = 20728680. Its totient is φ = 20234976.

The previous prime is 20481823. The next prime is 20481871. The reversal of 20481827 is 72818402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72818402 = 2 ⋅36409201.

It is a cyclic number.

It is not a de Polignac number, because 20481827 - 2² = 20481823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20481793 and 20481802.

It is not an unprimeable number, because it can be changed into a prime (20481823) 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, 123302 + ... + 123467.

It is an arithmetic number, because the mean of its divisors is an integer number (5182170).

Almost surely, 2^20481827 is an apocalyptic number.

20481827 is a deficient number, since it is larger than the sum of its proper divisors (246853).

20481827 is an equidigital number, since it uses as much as digits as its factorization.

20481827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246852.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 20481827 is about 4525.6852519812. The cubic root of 20481827 is about 273.6042869713.

The spelling of 20481827 in words is "twenty million, four hundred eighty-one thousand, eight hundred twenty-seven".