1023020020 has 48 divisors (see below), whose sum is σ = 2382097536. Its totient is φ = 365904000.

The previous prime is 1023019997. The next prime is 1023020039. The reversal of 1023020020 is 200203201.

It is a super-2 number, since 2×1023020020² = 2093139922641600800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1023019979 and 1023020006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24696 + ... + 51535.

It is an arithmetic number, because the mean of its divisors is an integer number (49627032).

Almost surely, 2^1023020020 is an apocalyptic number.

1023020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023020020 is an abundant number, since it is smaller than the sum of its proper divisors (1359077516).

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

1023020020 is a wasteful number, since it uses less digits than its factorization.

1023020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76312 (or 76310 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 1023020020 is about 31984.6841472602. The cubic root of 1023020020 is about 1007.6152015010.

Adding to 1023020020 its reverse (200203201), we get a palindrome (1223223221).

The spelling of 1023020020 in words is "one billion, twenty-three million, twenty thousand, twenty".