20274161 has 8 divisors (see below), whose sum is σ = 21228480. Its totient is φ = 19336912.

The previous prime is 20274157. The next prime is 20274173. The reversal of 20274161 is 16147202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20274161 - 2² = 20274157 is a prime.

It is a super-2 number, since 2×20274161² = 822083208507842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20274151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1805 + ... + 6618.

It is an arithmetic number, because the mean of its divisors is an integer number (2653560).

Almost surely, 2^20274161 is an apocalyptic number.

It is an amenable number.

20274161 is a deficient number, since it is larger than the sum of its proper divisors (954319).

20274161 is an equidigital number, since it uses as much as digits as its factorization.

20274161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8535.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20274161 is about 4502.6837552731. The cubic root of 20274161 is about 272.6764494218.

The spelling of 20274161 in words is "twenty million, two hundred seventy-four thousand, one hundred sixty-one".