20618074368 has 360 divisors, whose sum is σ = 67952763648. Its totient is φ = 6184747008.

The previous prime is 20618074339. The next prime is 20618074369. The reversal of 20618074368 is 86347081602.

20618074368 is a `hidden beast` number, since 20 + 618 + 0 + 7 + 4 + 3 + 6 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (20618074369) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8106505 + ... + 8109047.

Almost surely, 2^20618074368 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 20618074368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33976381824).

20618074368 is an abundant number, since it is smaller than the sum of its proper divisors (47334689280).

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

20618074368 is a wasteful number, since it uses less digits than its factorization.

20618074368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611 (or 2588 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 20618074368 in words is "twenty billion, six hundred eighteen million, seventy-four thousand, three hundred sixty-eight".