20284425 has 96 divisors (see below), whose sum is σ = 43925760. Its totient is φ = 9097920.

The previous prime is 20284421. The next prime is 20284441. The reversal of 20284425 is 52448202.

It is a happy number.

It is not a de Polignac number, because 20284425 - 2² = 20284421 is a prime.

It is a super-2 number, since 2×20284425² = 822915795161250, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20284421) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 382699 + ... + 382751.

It is an arithmetic number, because the mean of its divisors is an integer number (457560).

Almost surely, 2^20284425 is an apocalyptic number.

20284425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20284425 is an abundant number, since it is smaller than the sum of its proper divisors (23641335).

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

20284425 is an frugal number, since it uses more digits than its factorization.

20284425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 20284425 is about 4503.8233757553. The cubic root of 20284425 is about 272.7224567331.

The spelling of 20284425 in words is "twenty million, two hundred eighty-four thousand, four hundred twenty-five".