20102210500 has 24 divisors (see below), whose sum is σ = 43903228824. Its totient is φ = 8040884000.

The previous prime is 20102210477. The next prime is 20102210551. The reversal of 20102210500 is 501220102.

It can be written as a sum of positive squares in 4 ways, for example, as 5727159684 + 14375050816 = 75678^2 + 119896^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20101711 + ... + 20102710.

It is an arithmetic number, because the mean of its divisors is an integer number (1829301201).

Almost surely, 2^20102210500 is an apocalyptic number.

20102210500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102210500 is an abundant number, since it is smaller than the sum of its proper divisors (23801018324).

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

20102210500 is a wasteful number, since it uses less digits than its factorization.

20102210500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40204440 (or 40204428 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

Adding to 20102210500 its reverse (501220102), we get a palindrome (20603430602).

The spelling of 20102210500 in words is "twenty billion, one hundred two million, two hundred ten thousand, five hundred".