20123115142 has 16 divisors (see below), whose sum is σ = 33198201792. Its totient is φ = 9089982720.

The previous prime is 20123115139. The next prime is 20123115143. The reversal of 20123115142 is 24151132102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123115143) 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, 8232459 + ... + 8234902.

It is an arithmetic number, because the mean of its divisors is an integer number (2074887612).

Almost surely, 2^20123115142 is an apocalyptic number.

20123115142 is a deficient number, since it is larger than the sum of its proper divisors (13075086650).

20123115142 is a wasteful number, since it uses less digits than its factorization.

20123115142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16467423.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 20123115142 its reverse (24151132102), we get a palindrome (44274247244).

The spelling of 20123115142 in words is "twenty billion, one hundred twenty-three million, one hundred fifteen thousand, one hundred forty-two".