20478743670 has 128 divisors (see below), whose sum is σ = 62433192960. Its totient is φ = 4175009280.

The previous prime is 20478743599. The next prime is 20478743699. The reversal of 20478743670 is 7634787402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38796 + ... + 206064.

It is an arithmetic number, because the mean of its divisors is an integer number (487759320).

Almost surely, 2^20478743670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20478743670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31216596480).

20478743670 is an abundant number, since it is smaller than the sum of its proper divisors (41954449290).

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

20478743670 is a wasteful number, since it uses less digits than its factorization.

20478743670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167350.

The product of its (nonzero) digits is 1580544, while the sum is 48.

The spelling of 20478743670 in words is "twenty billion, four hundred seventy-eight million, seven hundred forty-three thousand, six hundred seventy".