20400141 has 4 divisors (see below), whose sum is σ = 27200192. Its totient is φ = 13600092.

The previous prime is 20400101. The next prime is 20400151. The reversal of 20400141 is 14100402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20400141 - 2⁷ = 20400013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3400021 + ... + 3400026.

It is an arithmetic number, because the mean of its divisors is an integer number (6800048).

Almost surely, 2^20400141 is an apocalyptic number.

It is an amenable number.

20400141 is a deficient number, since it is larger than the sum of its proper divisors (6800051).

20400141 is an equidigital number, since it uses as much as digits as its factorization.

20400141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6800050.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 20400141 is about 4516.6515251899. The cubic root of 20400141 is about 273.2400711302.

Adding to 20400141 its reverse (14100402), we get a palindrome (34500543).

The spelling of 20400141 in words is "twenty million, four hundred thousand, one hundred forty-one".