20503430012 has 24 divisors (see below), whose sum is σ = 39973533600. Its totient is φ = 9136806336.

The previous prime is 20503429927. The next prime is 20503430093. The reversal of 20503430012 is 21003430502.

It is a happy number.

It is a super-3 number, since 3×20503430012³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6796712 + ... + 6799727.

It is an arithmetic number, because the mean of its divisors is an integer number (1665563900).

Almost surely, 2^20503430012 is an apocalyptic number.

It is an amenable number.

20503430012 is a deficient number, since it is larger than the sum of its proper divisors (19470103588).

20503430012 is a wasteful number, since it uses less digits than its factorization.

20503430012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13596485 (or 13596483 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 20503430012 its reverse (21003430502), we get a palindrome (41506860514).

The spelling of 20503430012 in words is "twenty billion, five hundred three million, four hundred thirty thousand, twelve".