20397928151 has 2 divisors, whose sum is σ = 20397928152. Its totient is φ = 20397928150.

The previous prime is 20397928093. The next prime is 20397928153. The reversal of 20397928151 is 15182979302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20397928151 - 2¹⁸ = 20397666007 is a prime.

Together with 20397928153, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20397928096 and 20397928105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20397928153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10198964075 + 10198964076.

It is an arithmetic number, because the mean of its divisors is an integer number (10198964076).

Almost surely, 2^20397928151 is an apocalyptic number.

20397928151 is a deficient number, since it is larger than the sum of its proper divisors (1).

20397928151 is an equidigital number, since it uses as much as digits as its factorization.

20397928151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 47.

The spelling of 20397928151 in words is "twenty billion, three hundred ninety-seven million, nine hundred twenty-eight thousand, one hundred fifty-one".