21003030022020 has 48 divisors (see below), whose sum is σ = 58809801980160. Its totient is φ = 5600682489856.

The previous prime is 21003030021947. The next prime is 21003030022021. The reversal of 21003030022020 is 2022003030012.

It is a super-2 number, since 2×21003030022020² (a number of 27 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (21003030022021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1207197 + ... + 6592676.

It is an arithmetic number, because the mean of its divisors is an integer number (1225204207920).

Almost surely, 2^{21003030022020} is an apocalyptic number.

21003030022020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21003030022020 is an abundant number, since it is smaller than the sum of its proper divisors (37806771958140).

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

21003030022020 is a wasteful number, since it uses less digits than its factorization.

21003030022020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7844764 (or 7844762 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 21003030022020 its reverse (2022003030012), we get a palindrome (23025033052032).

The spelling of 21003030022020 in words is "twenty-one trillion, three billion, thirty million, twenty-two thousand, twenty".