20021432012 has 12 divisors (see below), whose sum is σ = 36560876016. Its totient is φ = 9575467440.

The previous prime is 20021431999. The next prime is 20021432047. The reversal of 20021432012 is 21023412002.

It is a super-2 number, since 2×20021432012² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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, 108812039 + ... + 108812222.

It is an arithmetic number, because the mean of its divisors is an integer number (3046739668).

Almost surely, 2^20021432012 is an apocalyptic number.

It is an amenable number.

20021432012 is a deficient number, since it is larger than the sum of its proper divisors (16539444004).

20021432012 is a wasteful number, since it uses less digits than its factorization.

20021432012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217624288 (or 217624286 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20021432012 its reverse (21023412002), we get a palindrome (41044844014).

The spelling of 20021432012 in words is "twenty billion, twenty-one million, four hundred thirty-two thousand, twelve".