20070257 has 2 divisors, whose sum is σ = 20070258. Its totient is φ = 20070256.

The previous prime is 20070229. The next prime is 20070307. The reversal of 20070257 is 75207002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18627856 + 1442401 = 4316^2 + 1201^2 .

It is a cyclic number.

It is not a de Polignac number, because 20070257 - 2¹² = 20066161 is a prime.

It is not a weakly prime, because it can be changed into another prime (20076257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10035128 + 10035129.

It is an arithmetic number, because the mean of its divisors is an integer number (10035129).

Almost surely, 2^20070257 is an apocalyptic number.

It is an amenable number.

20070257 is a deficient number, since it is larger than the sum of its proper divisors (1).

20070257 is an equidigital number, since it uses as much as digits as its factorization.

20070257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 20070257 is about 4479.9840401501. The cubic root of 20070257 is about 271.7592349347.

Adding to 20070257 its reverse (75207002), we get a palindrome (95277259).

The spelling of 20070257 in words is "twenty million, seventy thousand, two hundred fifty-seven".