20349151 has 2 divisors, whose sum is σ = 20349152. Its totient is φ = 20349150.

The previous prime is 20349137. The next prime is 20349157. The reversal of 20349151 is 15194302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20349151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20349157) 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, 10174575 + 10174576.

It is an arithmetic number, because the mean of its divisors is an integer number (10174576).

Almost surely, 2^20349151 is an apocalyptic number.

20349151 is a deficient number, since it is larger than the sum of its proper divisors (1).

20349151 is an equidigital number, since it uses as much as digits as its factorization.

20349151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 20349151 is about 4511.0033252038. The cubic root of 20349151 is about 273.0122273547.

The spelling of 20349151 in words is "twenty million, three hundred forty-nine thousand, one hundred fifty-one".