20438350143 has 8 divisors (see below), whose sum is σ = 27251828400. Its totient is φ = 13625219328.

The previous prime is 20438350139. The next prime is 20438350151. The reversal of 20438350143 is 34105383402.

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

It is not a de Polignac number, because 20438350143 - 2² = 20438350139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20438370143) 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, 122473 + ... + 236381.

It is an arithmetic number, because the mean of its divisors is an integer number (3406478550).

Almost surely, 2^20438350143 is an apocalyptic number.

20438350143 is a deficient number, since it is larger than the sum of its proper divisors (6813478257).

20438350143 is a wasteful number, since it uses less digits than its factorization.

20438350143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173721.

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 20438350143 in words is "twenty billion, four hundred thirty-eight million, three hundred fifty thousand, one hundred forty-three".