20123747392 has 28 divisors (see below), whose sum is σ = 45637785280. Its totient is φ = 8624462976.

The previous prime is 20123747377. The next prime is 20123747407. The reversal of 20123747392 is 29374732102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20123747377) and next prime (20123747407).

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22459092 + ... + 22459987.

Almost surely, 2^20123747392 is an apocalyptic number.

It is an amenable number.

20123747392 is an abundant number, since it is smaller than the sum of its proper divisors (25514037888).

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

20123747392 is an equidigital number, since it uses as much as digits as its factorization.

20123747392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44919098 (or 44919088 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 40.

The spelling of 20123747392 in words is "twenty billion, one hundred twenty-three million, seven hundred forty-seven thousand, three hundred ninety-two".