1020343420 has 12 divisors (see below), whose sum is σ = 2142721224. Its totient is φ = 408137360.

The previous prime is 1020343409. The next prime is 1020343459. The reversal of 1020343420 is 243430201.

It is a super-2 number, since 2×1020343420² = 2082201389474592800, which contains 22 as substring.

It is a congruent number.

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, 25508566 + ... + 25508605.

It is an arithmetic number, because the mean of its divisors is an integer number (178560102).

Almost surely, 2^1020343420 is an apocalyptic number.

1020343420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020343420 is an abundant number, since it is smaller than the sum of its proper divisors (1122377804).

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

1020343420 is a wasteful number, since it uses less digits than its factorization.

1020343420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51017180 (or 51017178 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1020343420 is about 31942.8148415258. The cubic root of 1020343420 is about 1006.7356689004.

Adding to 1020343420 its reverse (243430201), we get a palindrome (1263773621).

The spelling of 1020343420 in words is "one billion, twenty million, three hundred forty-three thousand, four hundred twenty".