20998362912 has 24 divisors (see below), whose sum is σ = 55120702896. Its totient is φ = 6999454272.

The previous prime is 20998362907. The next prime is 20998362919. The reversal of 20998362912 is 21926389902.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (20998362919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109366378 + ... + 109366569.

It is an arithmetic number, because the mean of its divisors is an integer number (2296695954).

Almost surely, 2^20998362912 is an apocalyptic number.

It is an amenable number.

20998362912 is an abundant number, since it is smaller than the sum of its proper divisors (34122339984).

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

20998362912 is a wasteful number, since it uses less digits than its factorization.

20998362912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218732960 (or 218732952 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 51.

The spelling of 20998362912 in words is "twenty billion, nine hundred ninety-eight million, three hundred sixty-two thousand, nine hundred twelve".