20123001131004 has 18 divisors (see below), whose sum is σ = 50866475081240. Its totient is φ = 6707667043656.

The previous prime is 20123001131003. The next prime is 20123001131063. The reversal of 20123001131004 is 40013110032102.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123001131003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 279486126784 + ... + 279486126855.

Almost surely, 2^{20123001131004} is an apocalyptic number.

It is an amenable number.

20123001131004 is an abundant number, since it is smaller than the sum of its proper divisors (30743473950236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123001131004 is a wasteful number, since it uses less digits than its factorization.

20123001131004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558972253649 (or 558972253644 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20123001131004 its reverse (40013110032102), we get a palindrome (60136111163106).

The spelling of 20123001131004 in words is "twenty trillion, one hundred twenty-three billion, one million, one hundred thirty-one thousand, four".