20300518 has 16 divisors (see below), whose sum is σ = 34859520. Its totient is φ = 8685576.

The previous prime is 20300507. The next prime is 20300519. The reversal of 20300518 is 81500302.

It is a happy number.

It is a super-2 number, since 2×20300518² = 824222062136648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20300495 and 20300504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20300519) 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 7 ways as a sum of consecutive naturals, for example, 13555 + ... + 14977.

It is an arithmetic number, because the mean of its divisors is an integer number (2178720).

Almost surely, 2^20300518 is an apocalyptic number.

20300518 is a deficient number, since it is larger than the sum of its proper divisors (14559002).

20300518 is a wasteful number, since it uses less digits than its factorization.

20300518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20300518 is about 4505.6096146914. The cubic root of 20300518 is about 272.7945606968.

The spelling of 20300518 in words is "twenty million, three hundred thousand, five hundred eighteen".