20146057 has 2 divisors, whose sum is σ = 20146058. Its totient is φ = 20146056.

The previous prime is 20146031. The next prime is 20146073. The reversal of 20146057 is 75064102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18011536 + 2134521 = 4244^2 + 1461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20146057 is a prime.

It is a super-2 number, since 2×20146057² = 811727225294498, which contains 22 as substring.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (20146157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10073028 + 10073029.

It is an arithmetic number, because the mean of its divisors is an integer number (10073029).

Almost surely, 2^20146057 is an apocalyptic number.

It is an amenable number.

20146057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20146057 is an equidigital number, since it uses as much as digits as its factorization.

20146057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20146057 is about 4488.4359191148. The cubic root of 20146057 is about 272.1009258181.

The spelling of 20146057 in words is "twenty million, one hundred forty-six thousand, fifty-seven".