20001132431430 has 32 divisors (see below), whose sum is σ = 48032477851104. Its totient is φ = 5330328646656.

The previous prime is 20001132431429. The next prime is 20001132431587. The reversal of 20001132431430 is 3413423110002.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20001132431430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206617579 + ... + 206714358.

It is an arithmetic number, because the mean of its divisors is an integer number (1501014932847).

Almost surely, 2^{20001132431430} is an apocalyptic number.

20001132431430 is an abundant number, since it is smaller than the sum of its proper divisors (28031345419674).

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

20001132431430 is a wasteful number, since it uses less digits than its factorization.

20001132431430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413333560.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 20001132431430 its reverse (3413423110002), we get a palindrome (23414555541432).

The spelling of 20001132431430 in words is "twenty trillion, one billion, one hundred thirty-two million, four hundred thirty-one thousand, four hundred thirty".