20423140012 has 12 divisors (see below), whose sum is σ = 38989631016. Its totient is φ = 9283245440.

The previous prime is 20423139983. The next prime is 20423140037. The reversal of 20423140012 is 21004132402.

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 3 ways as a sum of consecutive naturals, for example, 232081093 + ... + 232081180.

It is an arithmetic number, because the mean of its divisors is an integer number (3249135918).

Almost surely, 2^20423140012 is an apocalyptic number.

20423140012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20423140012 is a deficient number, since it is larger than the sum of its proper divisors (18566491004).

20423140012 is a wasteful number, since it uses less digits than its factorization.

20423140012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464162288 (or 464162286 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20423140012 its reverse (21004132402), we get a palindrome (41427272414).

The spelling of 20423140012 in words is "twenty billion, four hundred twenty-three million, one hundred forty thousand, twelve".