20992100012 has 24 divisors (see below), whose sum is σ = 39582219600. Its totient is φ = 9683718336.

The previous prime is 20992100009. The next prime is 20992100033. The reversal of 20992100012 is 21000129902.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 914 + ... + 204902.

It is an arithmetic number, because the mean of its divisors is an integer number (1649259150).

Almost surely, 2^20992100012 is an apocalyptic number.

It is an amenable number.

20992100012 is a deficient number, since it is larger than the sum of its proper divisors (18590119588).

20992100012 is a wasteful number, since it uses less digits than its factorization.

20992100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205985 (or 205983 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

Adding to 20992100012 its reverse (21000129902), we get a palindrome (41992229914).

The spelling of 20992100012 in words is "twenty billion, nine hundred ninety-two million, one hundred thousand, twelve".