20499999999898 has 32 divisors (see below), whose sum is σ = 31303921364352. Its totient is φ = 10066828728000.

The previous prime is 20499999999893. The next prime is 20499999999917. The reversal of 20499999999898 is 89899999999402.

It is a junction number, because it is equal to n+sod(n) for n = 20499999999797 and 20499999999806.

It is not an unprimeable number, because it can be changed into a prime (20499999999893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288896323 + ... + 288967273.

It is an arithmetic number, because the mean of its divisors is an integer number (978247542636).

Almost surely, 2^{20499999999898} is an apocalyptic number.

20499999999898 is a deficient number, since it is larger than the sum of its proper divisors (10803921364454).

20499999999898 is a wasteful number, since it uses less digits than its factorization.

20499999999898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81270.

The product of its (nonzero) digits is 198359290368, while the sum is 103.

The spelling of 20499999999898 in words is "twenty trillion, four hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred ninety-eight".