20907371 has 2 divisors, whose sum is σ = 20907372. Its totient is φ = 20907370.

The previous prime is 20907343. The next prime is 20907377. The reversal of 20907371 is 17370902.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20907371 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20907377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10453685 + 10453686.

It is an arithmetic number, because the mean of its divisors is an integer number (10453686).

Almost surely, 2^20907371 is an apocalyptic number.

20907371 is a deficient number, since it is larger than the sum of its proper divisors (1).

20907371 is an equidigital number, since it uses as much as digits as its factorization.

20907371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 20907371 is about 4572.4578729607. The cubic root of 20907371 is about 275.4861746921.

The spelling of 20907371 in words is "twenty million, nine hundred seven thousand, three hundred seventy-one".