20242730 has 16 divisors (see below), whose sum is σ = 36650664. Its totient is φ = 8049600.

The previous prime is 20242727. The next prime is 20242741. The reversal of 20242730 is 3724202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20133169 + 109561 = 4487^2 + 331^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4121 + ... + 7580.

Almost surely, 2^20242730 is an apocalyptic number.

20242730 is a deficient number, since it is larger than the sum of its proper divisors (16407934).

20242730 is a wasteful number, since it uses less digits than its factorization.

20242730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11881.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 20242730 is about 4499.1921497087. The cubic root of 20242730 is about 272.5354665842.

Adding to 20242730 its reverse (3724202), we get a palindrome (23966932).

The spelling of 20242730 in words is "twenty million, two hundred forty-two thousand, seven hundred thirty".