20625893 has 2 divisors, whose sum is σ = 20625894. Its totient is φ = 20625892.

The previous prime is 20625877. The next prime is 20625907. The reversal of 20625893 is 39852602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19775809 + 850084 = 4447^2 + 922^2 .

It is a cyclic number.

It is not a de Polignac number, because 20625893 - 2⁴ = 20625877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20625823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10312946 + 10312947.

It is an arithmetic number, because the mean of its divisors is an integer number (10312947).

Almost surely, 2^20625893 is an apocalyptic number.

It is an amenable number.

20625893 is a deficient number, since it is larger than the sum of its proper divisors (1).

20625893 is an equidigital number, since it uses as much as digits as its factorization.

20625893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 20625893 is about 4541.5738461463. The cubic root of 20625893 is about 274.2442854896.

The spelling of 20625893 in words is "twenty million, six hundred twenty-five thousand, eight hundred ninety-three".