20470727 has 2 divisors, whose sum is σ = 20470728. Its totient is φ = 20470726.

The previous prime is 20470721. The next prime is 20470729. The reversal of 20470727 is 72707402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20470727 - 2¹² = 20466631 is a prime.

Together with 20470729, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20470727.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20470721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10235363 + 10235364.

It is an arithmetic number, because the mean of its divisors is an integer number (10235364).

Almost surely, 2^20470727 is an apocalyptic number.

20470727 is a deficient number, since it is larger than the sum of its proper divisors (1).

20470727 is an equidigital number, since it uses as much as digits as its factorization.

20470727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5488, while the sum is 29.

The square root of 20470727 is about 4524.4587521603. The cubic root of 20470727 is about 273.5548519871.

The spelling of 20470727 in words is "twenty million, four hundred seventy thousand, seven hundred twenty-seven".