20143123012 has 6 divisors (see below), whose sum is σ = 35250465278. Its totient is φ = 10071561504.

The previous prime is 20143122983. The next prime is 20143123019. The reversal of 20143123012 is 21032134102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10655194176 + 9487928836 = 103224^2 + 97406^2 .

It is not an unprimeable number, because it can be changed into a prime (20143123019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2517890373 + ... + 2517890380.

Almost surely, 2^20143123012 is an apocalyptic number.

It is an amenable number.

20143123012 is a deficient number, since it is larger than the sum of its proper divisors (15107342266).

20143123012 is a wasteful number, since it uses less digits than its factorization.

20143123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5035780757 (or 5035780755 counting only the distinct ones).

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

Adding to 20143123012 its reverse (21032134102), we get a palindrome (41175257114).

The spelling of 20143123012 in words is "twenty billion, one hundred forty-three million, one hundred twenty-three thousand, twelve".