20074081 has 4 divisors (see below), whose sum is σ = 20721664. Its totient is φ = 19426500.

The previous prime is 20074057. The next prime is 20074139. The reversal of 20074081 is 18047002.

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: 18047002 = 2 ⋅9023501.

It is a cyclic number.

It is not a de Polignac number, because 20074081 - 2⁵ = 20074049 is a prime.

It is a super-2 number, since 2×20074081² = 805937455989122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20074031) 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, 323745 + ... + 323806.

It is an arithmetic number, because the mean of its divisors is an integer number (5180416).

Almost surely, 2^20074081 is an apocalyptic number.

It is an amenable number.

20074081 is a deficient number, since it is larger than the sum of its proper divisors (647583).

20074081 is an equidigital number, since it uses as much as digits as its factorization.

20074081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647582.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 20074081 is about 4480.4108070578. The cubic root of 20074081 is about 271.7764933305.

The spelling of 20074081 in words is "twenty million, seventy-four thousand, eighty-one".