20000021112 has 48 divisors (see below), whose sum is σ = 54179034000. Its totient is φ = 6665158656.

The previous prime is 20000021051. The next prime is 20000021137. The reversal of 20000021112 is 21112000002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20000021094 and 20000021103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313464 + ... + 371832.

It is an arithmetic number, because the mean of its divisors is an integer number (1128729875).

Almost surely, 2^20000021112 is an apocalyptic number.

It is an amenable number.

20000021112 is an abundant number, since it is smaller than the sum of its proper divisors (34179012888).

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

20000021112 is a wasteful number, since it uses less digits than its factorization.

20000021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63140 (or 63133 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20000021112 its reverse (21112000002), we get a palindrome (41112021114).

The spelling of 20000021112 in words is "twenty billion, twenty-one thousand, one hundred twelve".