20013284 has 12 divisors (see below), whose sum is σ = 37083564. Its totient is φ = 9417984.

The previous prime is 20013271. The next prime is 20013293. The reversal of 20013284 is 48231002.

It can be written as a sum of positive squares in 2 ways, for example, as 11764900 + 8248384 = 3430^2 + 2872^2 .

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, 147089 + ... + 147224.

It is an arithmetic number, because the mean of its divisors is an integer number (3090297).

Almost surely, 2^20013284 is an apocalyptic number.

It is an amenable number.

20013284 is a deficient number, since it is larger than the sum of its proper divisors (17070280).

20013284 is a wasteful number, since it uses less digits than its factorization.

20013284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294334 (or 294332 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20013284 is about 4473.6209048152. The cubic root of 20013284 is about 271.5018455649.

Adding to 20013284 its reverse (48231002), we get a palindrome (68244286).

The spelling of 20013284 in words is "twenty million, thirteen thousand, two hundred eighty-four".