20123131412 has 24 divisors (see below), whose sum is σ = 35397492480. Its totient is φ = 10009630400.

The previous prime is 20123131409. The next prime is 20123131423. The reversal of 20123131412 is 21413132102.

It is a super-2 number, since 2×20123131412² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1298912 + ... + 1314312.

It is an arithmetic number, because the mean of its divisors is an integer number (1474895520).

Almost surely, 2^20123131412 is an apocalyptic number.

It is an amenable number.

20123131412 is a deficient number, since it is larger than the sum of its proper divisors (15274361068).

20123131412 is a wasteful number, since it uses less digits than its factorization.

20123131412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17071 (or 17069 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20123131412 its reverse (21413132102), we get a palindrome (41536263514).

The spelling of 20123131412 in words is "twenty billion, one hundred twenty-three million, one hundred thirty-one thousand, four hundred twelve".