20073857 has 2 divisors, whose sum is σ = 20073858. Its totient is φ = 20073856.

The previous prime is 20073853. The next prime is 20073877. The reversal of 20073857 is 75837002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14318656 + 5755201 = 3784^2 + 2399^2 .

It is a cyclic number.

It is not a de Polignac number, because 20073857 - 2² = 20073853 is a prime.

It is not a weakly prime, because it can be changed into another prime (20073853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10036928 + 10036929.

It is an arithmetic number, because the mean of its divisors is an integer number (10036929).

Almost surely, 2^20073857 is an apocalyptic number.

It is an amenable number.

20073857 is a deficient number, since it is larger than the sum of its proper divisors (1).

20073857 is an equidigital number, since it uses as much as digits as its factorization.

20073857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 20073857 is about 4480.3858092803. The cubic root of 20073857 is about 271.7754824389.

The spelling of 20073857 in words is "twenty million, seventy-three thousand, eight hundred fifty-seven".