20284942 has 16 divisors (see below), whose sum is σ = 31946400. Its totient is φ = 9641632.

The previous prime is 20284937. The next prime is 20284973. The reversal of 20284942 is 24948202.

It is a super-2 number, since 2×20284942² = 822957743886728, which contains 22 as substring.

It is a congruent 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, 6684 + ... + 9232.

It is an arithmetic number, because the mean of its divisors is an integer number (1996650).

Almost surely, 2^20284942 is an apocalyptic number.

20284942 is a deficient number, since it is larger than the sum of its proper divisors (11661458).

20284942 is a wasteful number, since it uses less digits than its factorization.

20284942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 20284942 is about 4503.8807710684. The cubic root of 20284942 is about 272.7247737212.

The spelling of 20284942 in words is "twenty million, two hundred eighty-four thousand, nine hundred forty-two".