20031421012 has 12 divisors (see below), whose sum is σ = 35205438996. Its totient is φ = 9972724160.

The previous prime is 20031420979. The next prime is 20031421013. The reversal of 20031421012 is 21012413002.

It can be written as a sum of positive squares in 2 ways, for example, as 8692578756 + 11338842256 = 93234^2 + 106484^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031421013) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10745539 + ... + 10747402.

It is an arithmetic number, because the mean of its divisors is an integer number (2933786583).

Almost surely, 2^20031421012 is an apocalyptic number.

It is an amenable number.

20031421012 is a deficient number, since it is larger than the sum of its proper divisors (15174017984).

20031421012 is a wasteful number, since it uses less digits than its factorization.

20031421012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21493178 (or 21493176 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20031421012 its reverse (21012413002), we get a palindrome (41043834014).

The spelling of 20031421012 in words is "twenty billion, thirty-one million, four hundred twenty-one thousand, twelve".