20398473216 has 320 divisors, whose sum is σ = 66437712000. Its totient is φ = 6134169600.

The previous prime is 20398473167. The next prime is 20398473223. The reversal of 20398473216 is 61237489302.

20398473216 is a `hidden beast` number, since 2 + 0 + 398 + 47 + 3 + 216 = 666.

It is a zygodrome in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155713471 + ... + 155713601.

It is an arithmetic number, because the mean of its divisors is an integer number (207617850).

Almost surely, 2^20398473216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20398473216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33218856000).

20398473216 is an abundant number, since it is smaller than the sum of its proper divisors (46039238784).

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

20398473216 is an frugal number, since it uses more digits than its factorization.

20398473216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 20398473216 in words is "twenty billion, three hundred ninety-eight million, four hundred seventy-three thousand, two hundred sixteen".