20367481 has 2 divisors, whose sum is σ = 20367482. Its totient is φ = 20367480.

The previous prime is 20367469. The next prime is 20367491. The reversal of 20367481 is 18476302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14891881 + 5475600 = 3859^2 + 2340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20367481 is a prime.

It is a super-2 number, since 2×20367481² = 829668564570722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20367401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10183740 + 10183741.

It is an arithmetic number, because the mean of its divisors is an integer number (10183741).

Almost surely, 2^20367481 is an apocalyptic number.

It is an amenable number.

20367481 is a deficient number, since it is larger than the sum of its proper divisors (1).

20367481 is an equidigital number, since it uses as much as digits as its factorization.

20367481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20367481 is about 4513.0345666746. The cubic root of 20367481 is about 273.0941769209.

The spelling of 20367481 in words is "twenty million, three hundred sixty-seven thousand, four hundred eighty-one".