20467218393 has 6 divisors (see below), whose sum is σ = 29563759914. Its totient is φ = 13644812256.

The previous prime is 20467218367. The next prime is 20467218509. The reversal of 20467218393 is 39381276402.

20467218393 is a `hidden beast` number, since 2 + 0 + 46 + 7 + 218 + 393 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13635699984 + 6831518409 = 116772^2 + 82653^2 .

It is not a de Polignac number, because 20467218393 - 2¹² = 20467214297 is a prime.

It is a super-3 number, since 3×20467218393³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20467218313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1137067680 + ... + 1137067697.

It is an arithmetic number, because the mean of its divisors is an integer number (4927293319).

Almost surely, 2^20467218393 is an apocalyptic number.

It is an amenable number.

20467218393 is a deficient number, since it is larger than the sum of its proper divisors (9096541521).

20467218393 is a wasteful number, since it uses less digits than its factorization.

20467218393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274135383 (or 2274135380 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 20467218393 in words is "twenty billion, four hundred sixty-seven million, two hundred eighteen thousand, three hundred ninety-three".