20402143134 has 16 divisors (see below), whose sum is σ = 40806530688. Its totient is φ = 6800340312.

The previous prime is 20402143121. The next prime is 20402143199. The reversal of 20402143134 is 43134120402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39129 + ... + 205755.

It is an arithmetic number, because the mean of its divisors is an integer number (2550408168).

Almost surely, 2^20402143134 is an apocalyptic number.

20402143134 is an abundant number, since it is smaller than the sum of its proper divisors (20404387554).

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

20402143134 is a wasteful number, since it uses less digits than its factorization.

20402143134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187039.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20402143134 its reverse (43134120402), we get a palindrome (63536263536).

The spelling of 20402143134 in words is "twenty billion, four hundred two million, one hundred forty-three thousand, one hundred thirty-four".