20140393 has 32 divisors (see below), whose sum is σ = 26901504. Its totient is φ = 14625792.

The previous prime is 20140363. The next prime is 20140411. The reversal of 20140393 is 39304102.

It is a cyclic number.

It is not a de Polignac number, because 20140393 - 2¹³ = 20132201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20140303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72571 + ... + 72847.

It is an arithmetic number, because the mean of its divisors is an integer number (840672).

Almost surely, 2^20140393 is an apocalyptic number.

It is an amenable number.

20140393 is a deficient number, since it is larger than the sum of its proper divisors (6761111).

20140393 is a wasteful number, since it uses less digits than its factorization.

20140393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20140393 is about 4487.8049200027. The cubic root of 20140393 is about 272.0754233240.

Adding to 20140393 its reverse (39304102), we get a palindrome (59444495).

The spelling of 20140393 in words is "twenty million, one hundred forty thousand, three hundred ninety-three".