105203512020 has 96 divisors (see below), whose sum is σ = 307465337088. Its totient is φ = 26826826752.

The previous prime is 105203511983. The next prime is 105203512067. The reversal of 105203512020 is 20215302501.

It is a super-2 number, since 2×105203512020² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6003912 + ... + 6021408.

It is an arithmetic number, because the mean of its divisors is an integer number (3202763928).

Almost surely, 2^105203512020 is an apocalyptic number.

105203512020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

105203512020 is an abundant number, since it is smaller than the sum of its proper divisors (202261825068).

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

105203512020 is a wasteful number, since it uses less digits than its factorization.

105203512020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21889 (or 21887 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 105203512020 its reverse (20215302501), we get a palindrome (125418814521).

The spelling of 105203512020 in words is "one hundred five billion, two hundred three million, five hundred twelve thousand, twenty".