20021011110 has 32 divisors (see below), whose sum is σ = 53389363680. Its totient is φ = 5338936224.

The previous prime is 20021011103. The next prime is 20021011229. The reversal of 20021011110 is 1111012002.

It is a happy number.

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 = 20021011092 and 20021011101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37075677 + ... + 37076216.

It is an arithmetic number, because the mean of its divisors is an integer number (1668417615).

Almost surely, 2^20021011110 is an apocalyptic number.

20021011110 is an abundant number, since it is smaller than the sum of its proper divisors (33368352570).

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

20021011110 is a wasteful number, since it uses less digits than its factorization.

20021011110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74151909 (or 74151903 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20021011110 its reverse (1111012002), we get a palindrome (21132023112).

The spelling of 20021011110 in words is "twenty billion, twenty-one million, eleven thousand, one hundred ten".