20423230243432 has 32 divisors (see below), whose sum is σ = 38529118291680. Its totient is φ = 10148800754880.

The previous prime is 20423230243319. The next prime is 20423230243439. The reversal of 20423230243432 is 23434203232402.

It is not an unprimeable number, because it can be changed into a prime (20423230243439) 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, 129855882 + ... + 130013062.

It is an arithmetic number, because the mean of its divisors is an integer number (1204034946615).

Almost surely, 2^{20423230243432} is an apocalyptic number.

It is an amenable number.

20423230243432 is a deficient number, since it is larger than the sum of its proper divisors (18105888048248).

20423230243432 is a wasteful number, since it uses less digits than its factorization.

20423230243432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256993 (or 256989 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 34.

Adding to 20423230243432 its reverse (23434203232402), we get a palindrome (43857433475834).

The spelling of 20423230243432 in words is "twenty trillion, four hundred twenty-three billion, two hundred thirty million, two hundred forty-three thousand, four hundred thirty-two".