20021080110 has 16 divisors (see below), whose sum is σ = 48050592336. Its totient is φ = 5338954688.

The previous prime is 20021080109. The next prime is 20021080111. The reversal of 20021080110 is 1108012002.

It is an interprime number because it is at equal distance from previous prime (20021080109) and next prime (20021080111).

It is a super-2 number, since 2×20021080110² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20021080110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021080111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333684639 + ... + 333684698.

It is an arithmetic number, because the mean of its divisors is an integer number (3003162021).

Almost surely, 2^20021080110 is an apocalyptic number.

20021080110 is an abundant number, since it is smaller than the sum of its proper divisors (28029512226).

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

20021080110 is a wasteful number, since it uses less digits than its factorization.

20021080110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667369347.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20021080110 its reverse (1108012002), we get a palindrome (21129092112).

The spelling of 20021080110 in words is "twenty billion, twenty-one million, eighty thousand, one hundred ten".