20047151 has 2 divisors, whose sum is σ = 20047152. Its totient is φ = 20047150.

The previous prime is 20047133. The next prime is 20047177. The reversal of 20047151 is 15174002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20047151 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20047121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10023575 + 10023576.

It is an arithmetic number, because the mean of its divisors is an integer number (10023576).

Almost surely, 2^20047151 is an apocalyptic number.

20047151 is a deficient number, since it is larger than the sum of its proper divisors (1).

20047151 is an equidigital number, since it uses as much as digits as its factorization.

20047151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 20047151 is about 4477.4044936771. The cubic root of 20047151 is about 271.6549067555.

The spelling of 20047151 in words is "twenty million, forty-seven thousand, one hundred fifty-one".