20508130 has 8 divisors (see below), whose sum is σ = 36914652. Its totient is φ = 8203248.

The previous prime is 20508113. The next prime is 20508167. The reversal of 20508130 is 3180502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18688329 + 1819801 = 4323^2 + 1349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20508098 and 20508107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025397 + ... + 1025416.

Almost surely, 2^20508130 is an apocalyptic number.

20508130 is a deficient number, since it is larger than the sum of its proper divisors (16406522).

20508130 is a wasteful number, since it uses less digits than its factorization.

20508130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050820.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20508130 is about 4528.5902883789. The cubic root of 20508130 is about 273.7213588044.

Adding to 20508130 its reverse (3180502), we get a palindrome (23688632).

The spelling of 20508130 in words is "twenty million, five hundred eight thousand, one hundred thirty".