20280130 has 32 divisors (see below), whose sum is σ = 39869424. Its totient is φ = 7382016.

The previous prime is 20280119. The next prime is 20280149. The reversal of 20280130 is 3108202.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1418481 + 18861649 = 1191^2 + 4343^2 .

It is a super-2 number, since 2×20280130² = 822567345633800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8422 + ... + 10558.

Almost surely, 2^20280130 is an apocalyptic number.

20280130 is a deficient number, since it is larger than the sum of its proper divisors (19589294).

20280130 is a wasteful number, since it uses less digits than its factorization.

20280130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 20280130 is about 4503.3465334127. The cubic root of 20280130 is about 272.7032067317.

Adding to 20280130 its reverse (3108202), we get a palindrome (23388332).

The spelling of 20280130 in words is "twenty million, two hundred eighty thousand, one hundred thirty".