20478187432 has 16 divisors (see below), whose sum is σ = 38408261760. Its totient is φ = 10235984304.

The previous prime is 20478187423. The next prime is 20478187439. The reversal of 20478187432 is 23478187402.

It is not an unprimeable number, because it can be changed into a prime (20478187439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360568 + ... + 413479.

It is an arithmetic number, because the mean of its divisors is an integer number (2400516360).

Almost surely, 2^20478187432 is an apocalyptic number.

It is an amenable number.

20478187432 is a deficient number, since it is larger than the sum of its proper divisors (17930074328).

20478187432 is a wasteful number, since it uses less digits than its factorization.

20478187432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777360 (or 777356 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 46.

The spelling of 20478187432 in words is "twenty billion, four hundred seventy-eight million, one hundred eighty-seven thousand, four hundred thirty-two".