20310999998 has 4 divisors (see below), whose sum is σ = 30466500000. Its totient is φ = 10155499998.

The previous prime is 20310999997. The next prime is 20311000001. The reversal of 20310999998 is 89999901302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89999901302 = 2 ⋅44999950651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310999997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5077749998 + ... + 5077750001.

It is an arithmetic number, because the mean of its divisors is an integer number (7616625000).

Almost surely, 2^20310999998 is an apocalyptic number.

20310999998 is a deficient number, since it is larger than the sum of its proper divisors (10155500002).

20310999998 is a wasteful number, since it uses less digits than its factorization.

20310999998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10155500001.

The product of its (nonzero) digits is 2834352, while the sum is 59.

The spelling of 20310999998 in words is "twenty billion, three hundred ten million, nine hundred ninety-nine thousand, nine hundred ninety-eight".