20242864 has 10 divisors (see below), whose sum is σ = 39220580. Its totient is φ = 10121424.

The previous prime is 20242861. The next prime is 20242879. The reversal of 20242864 is 46824202.

It is not an unprimeable number, because it can be changed into a prime (20242861) by changing a digit.

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 as a sum of consecutive naturals, namely, 632574 + ... + 632605.

It is an arithmetic number, because the mean of its divisors is an integer number (3922058).

Almost surely, 2^20242864 is an apocalyptic number.

It is an amenable number.

20242864 is a deficient number, since it is larger than the sum of its proper divisors (18977716).

20242864 is a wasteful number, since it uses less digits than its factorization.

20242864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265187 (or 1265181 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 20242864 is about 4499.2070412463. The cubic root of 20242864 is about 272.5360679470.

The spelling of 20242864 in words is "twenty million, two hundred forty-two thousand, eight hundred sixty-four".