20197349 has 2 divisors, whose sum is σ = 20197350. Its totient is φ = 20197348.

The previous prime is 20197339. The next prime is 20197391. The reversal of 20197349 is 94379102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20160100 + 37249 = 4490^2 + 193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20197349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20197319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10098674 + 10098675.

It is an arithmetic number, because the mean of its divisors is an integer number (10098675).

Almost surely, 2^20197349 is an apocalyptic number.

It is an amenable number.

20197349 is a deficient number, since it is larger than the sum of its proper divisors (1).

20197349 is an equidigital number, since it uses as much as digits as its factorization.

20197349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 20197349 is about 4494.1460812929. The cubic root of 20197349 is about 272.3316537281.

The spelling of 20197349 in words is "twenty million, one hundred ninety-seven thousand, three hundred forty-nine".