20484899686 has 4 divisors (see below), whose sum is σ = 30727349532. Its totient is φ = 10242449842.

The previous prime is 20484899639. The next prime is 20484899693. The reversal of 20484899686 is 68699848402.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×20484899686² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 5121224920 + ... + 5121224923.

It is an arithmetic number, because the mean of its divisors is an integer number (7681837383).

Almost surely, 2^20484899686 is an apocalyptic number.

20484899686 is a deficient number, since it is larger than the sum of its proper divisors (10242449846).

20484899686 is a wasteful number, since it uses less digits than its factorization.

20484899686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10242449845.

The product of its (nonzero) digits is 47775744, while the sum is 64.

The spelling of 20484899686 in words is "twenty billion, four hundred eighty-four million, eight hundred ninety-nine thousand, six hundred eighty-six".