20018312 has 32 divisors (see below), whose sum is σ = 39502080. Its totient is φ = 9497280.

The previous prime is 20018293. The next prime is 20018351. The reversal of 20018312 is 21381002.

20018312 = 25⁴ + 26⁴ + ... + 40⁴.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12383 + ... + 13905.

It is an arithmetic number, because the mean of its divisors is an integer number (1234440).

Almost surely, 2^20018312 is an apocalyptic number.

It is an amenable number.

20018312 is a deficient number, since it is larger than the sum of its proper divisors (19483768).

20018312 is a wasteful number, since it uses less digits than its factorization.

20018312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613 (or 1609 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 20018312 is about 4474.1828304172. The cubic root of 20018312 is about 271.5245804140.

Adding to 20018312 its reverse (21381002), we get a palindrome (41399314).

The spelling of 20018312 in words is "twenty million, eighteen thousand, three hundred twelve".