20011231342 has 4 divisors (see below), whose sum is σ = 30016847016. Its totient is φ = 10005615670.

The previous prime is 20011231277. The next prime is 20011231381. The reversal of 20011231342 is 24313211002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24313211002 = 2 ⋅12156605501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5002807834 + ... + 5002807837.

It is an arithmetic number, because the mean of its divisors is an integer number (7504211754).

Almost surely, 2^20011231342 is an apocalyptic number.

20011231342 is a deficient number, since it is larger than the sum of its proper divisors (10005615674).

20011231342 is a wasteful number, since it uses less digits than its factorization.

20011231342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10005615673.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20011231342 its reverse (24313211002), we get a palindrome (44324442344).

The spelling of 20011231342 in words is "twenty billion, eleven million, two hundred thirty-one thousand, three hundred forty-two".