20284788 has 36 divisors (see below), whose sum is σ = 48935040. Its totient is φ = 6539760.

The previous prime is 20284787. The next prime is 20284793. The reversal of 20284788 is 88748202.

It is a super-2 number, since 2×20284788² = 822945248409888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20284787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10653 + ... + 12411.

Almost surely, 2^20284788 is an apocalyptic number.

It is an amenable number.

20284788 is an abundant number, since it is smaller than the sum of its proper divisors (28650252).

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

20284788 is a wasteful number, since it uses less digits than its factorization.

20284788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828 (or 1795 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 20284788 is about 4503.8636746687. The cubic root of 20284788 is about 272.7240835587.

The spelling of 20284788 in words is "twenty million, two hundred eighty-four thousand, seven hundred eighty-eight".