20394261 has 48 divisors (see below), whose sum is σ = 33022080. Its totient is φ = 12545280.

The previous prime is 20394233. The next prime is 20394263. The reversal of 20394261 is 16249302.

It is not a de Polignac number, because 20394261 - 2⁹ = 20393749 is a prime.

It is a super-2 number, since 2×20394261² = 831851763472242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20394263) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 229105 + ... + 229193.

It is an arithmetic number, because the mean of its divisors is an integer number (687960).

Almost surely, 2^20394261 is an apocalyptic number.

It is an amenable number.

20394261 is a deficient number, since it is larger than the sum of its proper divisors (12627819).

20394261 is an equidigital number, since it uses as much as digits as its factorization.

20394261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20394261 is about 4516.0005535872. Note that the first 3 decimals coincide. The cubic root of 20394261 is about 273.2138163116.

The spelling of 20394261 in words is "twenty million, three hundred ninety-four thousand, two hundred sixty-one".