21230103020 has 24 divisors (see below), whose sum is σ = 50952247584. Its totient is φ = 7278892416.

The previous prime is 21230103019. The next prime is 21230103029. The reversal of 21230103020 is 2030103212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21230102986 and 21230103004.

It is not an unprimeable number, because it can be changed into a prime (21230103029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75821657 + ... + 75821936.

It is an arithmetic number, because the mean of its divisors is an integer number (2123010316).

Almost surely, 2^21230103020 is an apocalyptic number.

21230103020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230103020 is an abundant number, since it is smaller than the sum of its proper divisors (29722144564).

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

21230103020 is a wasteful number, since it uses less digits than its factorization.

21230103020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151643609 (or 151643607 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21230103020 its reverse (2030103212), we get a palindrome (23260206232).

The spelling of 21230103020 in words is "twenty-one billion, two hundred thirty million, one hundred three thousand, twenty".