20123133542 has 8 divisors (see below), whose sum is σ = 30337922736. Its totient is φ = 10010492632.

The previous prime is 20123133523. The next prime is 20123133551. The reversal of 20123133542 is 24533132102.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25536578 + ... + 25537365.

It is an arithmetic number, because the mean of its divisors is an integer number (3792240342).

Almost surely, 2^20123133542 is an apocalyptic number.

20123133542 is a deficient number, since it is larger than the sum of its proper divisors (10214789194).

20123133542 is a wasteful number, since it uses less digits than its factorization.

20123133542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51074142.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 20123133542 its reverse (24533132102), we get a palindrome (44656265644).

The spelling of 20123133542 in words is "twenty billion, one hundred twenty-three million, one hundred thirty-three thousand, five hundred forty-two".