20343511320 has 64 divisors (see below), whose sum is σ = 66578768640. Its totient is φ = 4931760000.

The previous prime is 20343511297. The next prime is 20343511351. The reversal of 20343511320 is 2311534302.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 7704556 + ... + 7707195.

It is an arithmetic number, because the mean of its divisors is an integer number (1040293260).

Almost surely, 2^20343511320 is an apocalyptic number.

20343511320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20343511320 is an abundant number, since it is smaller than the sum of its proper divisors (46235257320).

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

20343511320 is a wasteful number, since it uses less digits than its factorization.

20343511320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15411776 (or 15411772 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The spelling of 20343511320 in words is "twenty billion, three hundred forty-three million, five hundred eleven thousand, three hundred twenty".