20147845392 has 420 divisors, whose sum is σ = 64076818960. Its totient is φ = 6129478656.

The previous prime is 20147845391. The next prime is 20147845397. The reversal of 20147845392 is 29354874102.

20147845392 is a `hidden beast` number, since 20 + 14 + 7 + 84 + 539 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (20147845391) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 144948459 + ... + 144948597.

Almost surely, 2^20147845392 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 20147845392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32038409480).

20147845392 is an abundant number, since it is smaller than the sum of its proper divisors (43928973568).

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

20147845392 is a wasteful number, since it uses less digits than its factorization.

20147845392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 20147845392 in words is "twenty billion, one hundred forty-seven million, eight hundred forty-five thousand, three hundred ninety-two".