1020345520 has 20 divisors (see below), whose sum is σ = 2372303520. Its totient is φ = 408138176.

The previous prime is 1020345503. The next prime is 1020345533. The reversal of 1020345520 is 255430201.

1020345520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1020345520² = 2082209960368140800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1020345491 and 1020345500.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6377080 + ... + 6377239.

It is an arithmetic number, because the mean of its divisors is an integer number (118615176).

Almost surely, 2^1020345520 is an apocalyptic number.

1020345520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020345520 is an abundant number, since it is smaller than the sum of its proper divisors (1351958000).

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

1020345520 is a wasteful number, since it uses less digits than its factorization.

1020345520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12754332 (or 12754326 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1020345520 is about 31942.8477127510. The cubic root of 1020345520 is about 1006.7363595644.

Adding to 1020345520 its reverse (255430201), we get a palindrome (1275775721).

The spelling of 1020345520 in words is "one billion, twenty million, three hundred forty-five thousand, five hundred twenty".