20327455818 has 32 divisors (see below), whose sum is σ = 45218761920. Its totient is φ = 6768822960.

The previous prime is 20327455807. The next prime is 20327455823. The reversal of 20327455818 is 81855472302.

20327455818 is a `hidden beast` number, since 2 + 0 + 3 + 27 + 45 + 581 + 8 = 666.

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, 141405 + ... + 246272.

It is an arithmetic number, because the mean of its divisors is an integer number (1413086310).

Almost surely, 2^20327455818 is an apocalyptic number.

20327455818 is an abundant number, since it is smaller than the sum of its proper divisors (24891306102).

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

20327455818 is a wasteful number, since it uses less digits than its factorization.

20327455818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388659 (or 388653 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 20327455818 in words is "twenty billion, three hundred twenty-seven million, four hundred fifty-five thousand, eight hundred eighteen".