20243403402111 has 24 divisors (see below), whose sum is σ = 29908101646800. Its totient is φ = 13189446905856.

The previous prime is 20243403402059. The next prime is 20243403402143. The reversal of 20243403402111 is 11120430434202.

20243403402111 is a `hidden beast` number, since 2 + 0 + 2 + 4 + 3 + 403 + 40 + 211 + 1 = 666.

It is not a de Polignac number, because 20243403402111 - 2¹⁰ = 20243403401087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243403402181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82443561 + ... + 82688738.

It is an arithmetic number, because the mean of its divisors is an integer number (1246170901950).

Almost surely, 2^{20243403402111} is an apocalyptic number.

20243403402111 is a deficient number, since it is larger than the sum of its proper divisors (9664698244689).

20243403402111 is a wasteful number, since it uses less digits than its factorization.

20243403402111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165132615 (or 165132612 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 20243403402111 its reverse (11120430434202), we get a palindrome (31363833836313).

The spelling of 20243403402111 in words is "twenty trillion, two hundred forty-three billion, four hundred three million, four hundred two thousand, one hundred eleven".