20280068 has 24 divisors (see below), whose sum is σ = 37514400. Its totient is φ = 9566208.

The previous prime is 20280067. The next prime is 20280101. The reversal of 20280068 is 86008202.

It is a super-2 number, since 2×20280068² = 822562316169248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20280061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25988 + ... + 26756.

It is an arithmetic number, because the mean of its divisors is an integer number (1563100).

Almost surely, 2^20280068 is an apocalyptic number.

It is an amenable number.

20280068 is a deficient number, since it is larger than the sum of its proper divisors (17234332).

20280068 is a wasteful number, since it uses less digits than its factorization.

20280068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1137 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 20280068 is about 4503.3396496378. The cubic root of 20280068 is about 272.7029288305.

The spelling of 20280068 in words is "twenty million, two hundred eighty thousand, sixty-eight".