20403144312 has 32 divisors (see below), whose sum is σ = 51068707200. Its totient is φ = 6792935264.

The previous prime is 20403144299. The next prime is 20403144317. The reversal of 20403144312 is 21344130402.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20403144317) 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, 486498 + ... + 526769.

It is an arithmetic number, because the mean of its divisors is an integer number (1595897100).

Almost surely, 2^20403144312 is an apocalyptic number.

It is an amenable number.

20403144312 is an abundant number, since it is smaller than the sum of its proper divisors (30665562888).

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

20403144312 is a wasteful number, since it uses less digits than its factorization.

20403144312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014115 (or 1014111 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20403144312 its reverse (21344130402), we get a palindrome (41747274714).

The spelling of 20403144312 in words is "twenty billion, four hundred three million, one hundred forty-four thousand, three hundred twelve".