20198662884 has 27 divisors (see below), whose sum is σ = 51059886787. Its totient is φ = 6732603384.

The previous prime is 20198662831. The next prime is 20198662903. The reversal of 20198662884 is 48826689102.

The square root of 20198662884 is 142122.

It is a perfect power (a square), and thus also a powerful number.

20198662884 is a `hidden beast` number, since 2 + 0 + 1 + 9 + 8 + 6 + 628 + 8 + 4 = 666.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20198662884.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 840889 + ... + 864575.

Almost surely, 2^20198662884 is an apocalyptic number.

20198662884 is the 142122-nd square number.

It is an amenable number.

20198662884 is an abundant number, since it is smaller than the sum of its proper divisors (30861223903).

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

20198662884 is an frugal number, since it uses more digits than its factorization.

20198662884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47384 (or 23692 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 20198662884 in words is "twenty billion, one hundred ninety-eight million, six hundred sixty-two thousand, eight hundred eighty-four".