20625071 has 2 divisors, whose sum is σ = 20625072. Its totient is φ = 20625070.

The previous prime is 20625067. The next prime is 20625103. The reversal of 20625071 is 17052602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20625071 - 2² = 20625067 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20625041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10312535 + 10312536.

It is an arithmetic number, because the mean of its divisors is an integer number (10312536).

Almost surely, 2^20625071 is an apocalyptic number.

20625071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20625071 is an equidigital number, since it uses as much as digits as its factorization.

20625071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20625071 is about 4541.4833479822. The cubic root of 20625071 is about 274.2406423051.

Adding to 20625071 its reverse (17052602), we get a palindrome (37677673).

The spelling of 20625071 in words is "twenty million, six hundred twenty-five thousand, seventy-one".