20284330 has 32 divisors (see below), whose sum is σ = 40497408. Its totient is φ = 7252800.

The previous prime is 20284301. The next prime is 20284331. The reversal of 20284330 is 3348202.

It is a super-2 number, since 2×20284330² = 822908087097800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (20284331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5199 + ... + 8221.

It is an arithmetic number, because the mean of its divisors is an integer number (1265544).

Almost surely, 2^20284330 is an apocalyptic number.

20284330 is a deficient number, since it is larger than the sum of its proper divisors (20213078).

20284330 is a wasteful number, since it uses less digits than its factorization.

20284330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20284330 is about 4503.8128291482. The cubic root of 20284330 is about 272.7220309767.

The spelling of 20284330 in words is "twenty million, two hundred eighty-four thousand, three hundred thirty".