20745341 has 2 divisors, whose sum is σ = 20745342. Its totient is φ = 20745340.

The previous prime is 20745301. The next prime is 20745343. The reversal of 20745341 is 14354702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19802500 + 942841 = 4450^2 + 971^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20745341 is a prime.

Together with 20745343, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20745341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20745343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10372670 + 10372671.

It is an arithmetic number, because the mean of its divisors is an integer number (10372671).

Almost surely, 2^20745341 is an apocalyptic number.

It is an amenable number.

20745341 is a deficient number, since it is larger than the sum of its proper divisors (1).

20745341 is an equidigital number, since it uses as much as digits as its factorization.

20745341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 20745341 is about 4554.7053691759. The cubic root of 20745341 is about 274.7726650127.

The spelling of 20745341 in words is "twenty million, seven hundred forty-five thousand, three hundred forty-one".