20020343520 has 96 divisors (see below), whose sum is σ = 63772803360. Its totient is φ = 5278760960.

The previous prime is 20020343479. The next prime is 20020343531. The reversal of 20020343520 is 2534302002.

It is a tau number, because it is divible by the number of its divisors (96).

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, 191601 + ... + 277040.

It is an arithmetic number, because the mean of its divisors is an integer number (664300035).

Almost surely, 2^20020343520 is an apocalyptic number.

20020343520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020343520 is an abundant number, since it is smaller than the sum of its proper divisors (43752459840).

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

20020343520 is a wasteful number, since it uses less digits than its factorization.

20020343520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468748 (or 468740 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

Adding to 20020343520 its reverse (2534302002), we get a palindrome (22554645522).

The spelling of 20020343520 in words is "twenty billion, twenty million, three hundred forty-three thousand, five hundred twenty".