21023030241020 has 24 divisors (see below), whose sum is σ = 44304364802544. Its totient is φ = 8379497563776.

The previous prime is 21023030241011. The next prime is 21023030241023. The reversal of 21023030241020 is 2014203032012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21023030240983 and 21023030241001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023030241023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1857152489 + ... + 1857163808.

It is an arithmetic number, because the mean of its divisors is an integer number (1846015200106).

Almost surely, 2^{21023030241020} is an apocalyptic number.

21023030241020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21023030241020 is an abundant number, since it is smaller than the sum of its proper divisors (23281334561524).

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

21023030241020 is a wasteful number, since it uses less digits than its factorization.

21023030241020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3714316589 (or 3714316587 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21023030241020 its reverse (2014203032012), we get a palindrome (23037233273032).

The spelling of 21023030241020 in words is "twenty-one trillion, twenty-three billion, thirty million, two hundred forty-one thousand, twenty".