20473751 has 2 divisors, whose sum is σ = 20473752. Its totient is φ = 20473750.

The previous prime is 20473723. The next prime is 20473753. The reversal of 20473751 is 15737402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20473751 is a prime.

Together with 20473753, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20473753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10236875 + 10236876.

It is an arithmetic number, because the mean of its divisors is an integer number (10236876).

Almost surely, 2^20473751 is an apocalyptic number.

20473751 is a deficient number, since it is larger than the sum of its proper divisors (1).

20473751 is an equidigital number, since it uses as much as digits as its factorization.

20473751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 20473751 is about 4524.7929234386. The cubic root of 20473751 is about 273.5683214508.

The spelling of 20473751 in words is "twenty million, four hundred seventy-three thousand, seven hundred fifty-one".