20478731206 has 8 divisors (see below), whose sum is σ = 30719818584. Its totient is φ = 10238791680.

The previous prime is 20478731159. The next prime is 20478731219. The reversal of 20478731206 is 60213787402.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 240880 + ... + 314611.

It is an arithmetic number, because the mean of its divisors is an integer number (3839977323).

Almost surely, 2^20478731206 is an apocalyptic number.

20478731206 is a deficient number, since it is larger than the sum of its proper divisors (10241087378).

20478731206 is a wasteful number, since it uses less digits than its factorization.

20478731206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573926.

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 20478731206 in words is "twenty billion, four hundred seventy-eight million, seven hundred thirty-one thousand, two hundred six".