20434344431 has 8 divisors (see below), whose sum is σ = 21097004544. Its totient is φ = 19771902360.

The previous prime is 20434344419. The next prime is 20434344449. The reversal of 20434344431 is 13444343402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20434344431 - 2³⁰ = 19360602607 is a prime.

It is a super-2 number, since 2×20434344431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434343431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147956 + ... + 250518.

It is an arithmetic number, because the mean of its divisors is an integer number (2637125568).

Almost surely, 2^20434344431 is an apocalyptic number.

20434344431 is a deficient number, since it is larger than the sum of its proper divisors (662660113).

20434344431 is a wasteful number, since it uses less digits than its factorization.

20434344431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109021.

The product of its (nonzero) digits is 55296, while the sum is 32.

Adding to 20434344431 its reverse (13444343402), we get a palindrome (33878687833).

The spelling of 20434344431 in words is "twenty billion, four hundred thirty-four million, three hundred forty-four thousand, four hundred thirty-one".