20218363820 has 24 divisors (see below), whose sum is σ = 42878950128. Its totient is φ = 8007272000.

The previous prime is 20218363819. The next prime is 20218363843. The reversal of 20218363820 is 2836381202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5002526 + ... + 5006565.

It is an arithmetic number, because the mean of its divisors is an integer number (1786622922).

Almost surely, 2^20218363820 is an apocalyptic number.

20218363820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20218363820 is an abundant number, since it is smaller than the sum of its proper divisors (22660586308).

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

20218363820 is a wasteful number, since it uses less digits than its factorization.

20218363820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10009201 (or 10009199 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 20218363820 in words is "twenty billion, two hundred eighteen million, three hundred sixty-three thousand, eight hundred twenty".