1023021020 has 36 divisors (see below), whose sum is σ = 2499096600. Its totient is φ = 350749728.

The previous prime is 1023020993. The next prime is 1023021101. The reversal of 1023021020 is 201203201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1023020992 and 1023021010.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 520970 + ... + 522929.

It is an arithmetic number, because the mean of its divisors is an integer number (69419350).

Almost surely, 2^1023021020 is an apocalyptic number.

1023021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023021020 is an abundant number, since it is smaller than the sum of its proper divisors (1476075580).

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

1023021020 is a wasteful number, since it uses less digits than its factorization.

1023021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043922 (or 1043913 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1023021020 is about 31984.6997797384. The cubic root of 1023021020 is about 1007.6155298148.

Adding to 1023021020 its reverse (201203201), we get a palindrome (1224224221).

The spelling of 1023021020 in words is "one billion, twenty-three million, twenty-one thousand, twenty".