20403303012 has 36 divisors (see below), whose sum is σ = 51916586176. Its totient is φ = 6756058800.

The previous prime is 20403302923. The next prime is 20403303043. The reversal of 20403303012 is 21030330402.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1871248 + ... + 1882119.

Almost surely, 2^20403303012 is an apocalyptic number.

It is an amenable number.

20403303012 is an abundant number, since it is smaller than the sum of its proper divisors (31513283164).

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

20403303012 is a wasteful number, since it uses less digits than its factorization.

20403303012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3753528 (or 3753523 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20403303012 its reverse (21030330402), we get a palindrome (41433633414).

The spelling of 20403303012 in words is "twenty billion, four hundred three million, three hundred three thousand, twelve".