20280014 has 32 divisors (see below), whose sum is σ = 33841152. Its totient is φ = 9072000.

The previous prime is 20279993. The next prime is 20280017. The reversal of 20280014 is 41008202.

It is a super-2 number, since 2×20280014² = 822557935680392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 20279974 and 20280001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20280017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74699 + ... + 74969.

It is an arithmetic number, because the mean of its divisors is an integer number (1057536).

Almost surely, 2^20280014 is an apocalyptic number.

20280014 is a deficient number, since it is larger than the sum of its proper divisors (13561138).

20280014 is a wasteful number, since it uses less digits than its factorization.

20280014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 20280014 is about 4503.3336540834. Note that the first 3 decimals coincide. The cubic root of 20280014 is about 272.7026867870.

Adding to 20280014 its reverse (41008202), we get a palindrome (61288216).

The spelling of 20280014 in words is "twenty million, two hundred eighty thousand, fourteen".