20343765988 has 48 divisors (see below), whose sum is σ = 45328308480. Its totient is φ = 7770559104.

The previous prime is 20343765947. The next prime is 20343765997. The reversal of 20343765988 is 88956734302.

It is a super-2 number, since 2×20343765988² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 953056 + ... + 974167.

It is an arithmetic number, because the mean of its divisors is an integer number (944339760).

Almost surely, 2^20343765988 is an apocalyptic number.

20343765988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20343765988 is an abundant number, since it is smaller than the sum of its proper divisors (24984542492).

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

20343765988 is a wasteful number, since it uses less digits than its factorization.

20343765988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927276 (or 1927274 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 20343765988 in words is "twenty billion, three hundred forty-three million, seven hundred sixty-five thousand, nine hundred eighty-eight".