20284074 has 16 divisors (see below), whose sum is σ = 45075840. Its totient is φ = 6761340.

The previous prime is 20284051. The next prime is 20284081. The reversal of 20284074 is 47048202.

It is a super-2 number, since 2×20284074² = 822887316074952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 187762 + ... + 187869.

It is an arithmetic number, because the mean of its divisors is an integer number (2817240).

Almost surely, 2^20284074 is an apocalyptic number.

20284074 is an abundant number, since it is smaller than the sum of its proper divisors (24791766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20284074 is a wasteful number, since it uses less digits than its factorization.

20284074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375642 (or 375636 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 20284074 is about 4503.7844086945. The cubic root of 20284074 is about 272.7208836685.

The spelling of 20284074 in words is "twenty million, two hundred eighty-four thousand, seventy-four".