20400203141 has 2 divisors, whose sum is σ = 20400203142. Its totient is φ = 20400203140.

The previous prime is 20400203113. The next prime is 20400203179. The reversal of 20400203141 is 14130200402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17941530916 + 2458672225 = 133946^2 + 49585^2 .

It is a cyclic number.

It is not a de Polignac number, because 20400203141 - 2¹⁰ = 20400202117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20400203041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200101570 + 10200101571.

It is an arithmetic number, because the mean of its divisors is an integer number (10200101571).

Almost surely, 2^20400203141 is an apocalyptic number.

It is an amenable number.

20400203141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20400203141 is an equidigital number, since it uses as much as digits as its factorization.

20400203141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20400203141 its reverse (14130200402), we get a palindrome (34530403543).

The spelling of 20400203141 in words is "twenty billion, four hundred million, two hundred three thousand, one hundred forty-one".