20285045 has 12 divisors (see below), whose sum is σ = 26756940. Its totient is φ = 14752320.

The previous prime is 20285033. The next prime is 20285051. The reversal of 20285045 is 54058202.

It can be written as a sum of positive squares in 2 ways, for example, as 9897316 + 10387729 = 3146^2 + 3223^2 .

It is not a de Polignac number, because 20285045 - 2⁶ = 20284981 is a prime.

It is a super-2 number, since 2×20285045² = 822966101304050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16160 + ... + 17369.

It is an arithmetic number, because the mean of its divisors is an integer number (2229745).

Almost surely, 2^20285045 is an apocalyptic number.

It is an amenable number.

20285045 is a deficient number, since it is larger than the sum of its proper divisors (6471895).

20285045 is a wasteful number, since it uses less digits than its factorization.

20285045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33556 (or 33545 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 20285045 is about 4503.8922056373. The cubic root of 20285045 is about 272.7252353215.

The spelling of 20285045 in words is "twenty million, two hundred eighty-five thousand, forty-five".