20191351 has 2 divisors, whose sum is σ = 20191352. Its totient is φ = 20191350.

The previous prime is 20191343. The next prime is 20191387. The reversal of 20191351 is 15319102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20191351 - 2³ = 20191343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20191151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10095675 + 10095676.

It is an arithmetic number, because the mean of its divisors is an integer number (10095676).

Almost surely, 2^20191351 is an apocalyptic number.

20191351 is a deficient number, since it is larger than the sum of its proper divisors (1).

20191351 is an equidigital number, since it uses as much as digits as its factorization.

20191351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 20191351 is about 4493.4787192108. The cubic root of 20191351 is about 272.3046929789.

The spelling of 20191351 in words is "twenty million, one hundred ninety-one thousand, three hundred fifty-one".