20133431430 has 128 divisors (see below), whose sum is σ = 57221406720. Its totient is φ = 4436536320.

The previous prime is 20133431333. The next prime is 20133431443. The reversal of 20133431430 is 3413433102.

It is a super-2 number, since 2×20133431430² (a number of 21 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 20133431430.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1745442 + ... + 1756938.

It is an arithmetic number, because the mean of its divisors is an integer number (447042240).

Almost surely, 2^20133431430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20133431430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28610703360).

20133431430 is an abundant number, since it is smaller than the sum of its proper divisors (37087975290).

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

20133431430 is a wasteful number, since it uses less digits than its factorization.

20133431430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11814.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 20133431430 its reverse (3413433102), we get a palindrome (23546864532).

The spelling of 20133431430 in words is "twenty billion, one hundred thirty-three million, four hundred thirty-one thousand, four hundred thirty".