21020253031330 has 128 divisors (see below), whose sum is σ = 44899422253056. Its totient is φ = 6933504614400.

The previous prime is 21020253031321. The next prime is 21020253031381. The reversal of 21020253031330 is 3313035202012.

It is a super-2 number, since 2×21020253031330² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21020253031295 and 21020253031304.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 263990604 + ... + 264070216.

It is an arithmetic number, because the mean of its divisors is an integer number (350776736352).

Almost surely, 2^{21020253031330} is an apocalyptic number.

21020253031330 is an abundant number, since it is smaller than the sum of its proper divisors (23879169221726).

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

21020253031330 is a wasteful number, since it uses less digits than its factorization.

21020253031330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80372.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 21020253031330 its reverse (3313035202012), we get a palindrome (24333288233342).

The spelling of 21020253031330 in words is "twenty-one trillion, twenty billion, two hundred fifty-three million, thirty-one thousand, three hundred thirty".