20298057 has 32 divisors (see below), whose sum is σ = 30602880. Its totient is φ = 11880960.

The previous prime is 20298049. The next prime is 20298067. The reversal of 20298057 is 75089202.

It is not a de Polignac number, because 20298057 - 2³ = 20298049 is a prime.

It is a super-2 number, since 2×20298057² = 824022235950498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20298067) 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 in 31 ways as a sum of consecutive naturals, for example, 148093 + ... + 148229.

It is an arithmetic number, because the mean of its divisors is an integer number (956340).

Almost surely, 2^20298057 is an apocalyptic number.

It is an amenable number.

20298057 is a deficient number, since it is larger than the sum of its proper divisors (10304823).

20298057 is a wasteful number, since it uses less digits than its factorization.

20298057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 20298057 is about 4505.3365024158. The cubic root of 20298057 is about 272.7835367656.

The spelling of 20298057 in words is "twenty million, two hundred ninety-eight thousand, fifty-seven".