20400211141 has 4 divisors (see below), whose sum is σ = 20416892832. Its totient is φ = 20383529452.

The previous prime is 20400211127. The next prime is 20400211147. The reversal of 20400211141 is 14111200402.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20400211141 is a prime.

It is a super-2 number, since 2×20400211141² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400211147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8339011 + ... + 8341456.

It is an arithmetic number, because the mean of its divisors is an integer number (5104223208).

Almost surely, 2^20400211141 is an apocalyptic number.

It is an amenable number.

20400211141 is a deficient number, since it is larger than the sum of its proper divisors (16681691).

20400211141 is a wasteful number, since it uses less digits than its factorization.

20400211141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16681690.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20400211141 its reverse (14111200402), we get a palindrome (34511411543).

The spelling of 20400211141 in words is "twenty billion, four hundred million, two hundred eleven thousand, one hundred forty-one".