20284554 has 16 divisors (see below), whose sum is σ = 41257440. Its totient is φ = 6646800.

The previous prime is 20284549. The next prime is 20284559. The reversal of 20284554 is 45548202.

20284554 is nontrivially palindromic in base 7.

It is an interprime number because it is at equal distance from previous prime (20284549) and next prime (20284559).

It is a super-2 number, since 2×20284554² = 822926261957832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20284559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28297 + ... + 29004.

It is an arithmetic number, because the mean of its divisors is an integer number (2578590).

Almost surely, 2^20284554 is an apocalyptic number.

20284554 is an abundant number, since it is smaller than the sum of its proper divisors (20972886).

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

20284554 is a wasteful number, since it uses less digits than its factorization.

20284554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57365.

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 20284554 is about 4503.8376968981. The cubic root of 20284554 is about 272.7230348634.

The spelling of 20284554 in words is "twenty million, two hundred eighty-four thousand, five hundred fifty-four".