20443111134402 has 64 divisors (see below), whose sum is σ = 45809663612544. Its totient is φ = 6027318512640.

The previous prime is 20443111134379. The next prime is 20443111134409.

It is a happy number.

20443111134402 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×20443111134402² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20443111134402.

It is not an unprimeable number, because it can be changed into a prime (20443111134409) 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, 182842588 + ... + 182954360.

It is an arithmetic number, because the mean of its divisors is an integer number (715775993946).

Almost surely, 2^{20443111134402} is an apocalyptic number.

20443111134402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20443111134402 is an abundant number, since it is smaller than the sum of its proper divisors (25366552478142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20443111134402 is a wasteful number, since it uses less digits than its factorization.

20443111134402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186723.

The product of its (nonzero) digits is 9216, while the sum is 30.

It can be divided in two parts, 2044311 and 1134402, that added together give a palindrome (3178713).

The spelling of 20443111134402 in words is "twenty trillion, four hundred forty-three billion, one hundred eleven million, one hundred thirty-four thousand, four hundred two".