20342487872 has 28 divisors (see below), whose sum is σ = 46133857440. Its totient is φ = 8718208896.

The previous prime is 20342487829. The next prime is 20342487887. The reversal of 20342487872 is 27878424302.

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

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, 22703222 + ... + 22704117.

Almost surely, 2^20342487872 is an apocalyptic number.

It is an amenable number.

20342487872 is an abundant number, since it is smaller than the sum of its proper divisors (25791369568).

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

20342487872 is an equidigital number, since it uses as much as digits as its factorization.

20342487872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45407358 (or 45407348 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 47.

The spelling of 20342487872 in words is "twenty billion, three hundred forty-two million, four hundred eighty-seven thousand, eight hundred seventy-two".