20812908982 has 4 divisors (see below), whose sum is σ = 31219363476. Its totient is φ = 10406454490.

The previous prime is 20812908979. The next prime is 20812908989. The reversal of 20812908982 is 28980921802.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20812908989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5203227244 + ... + 5203227247.

It is an arithmetic number, because the mean of its divisors is an integer number (7804840869).

Almost surely, 2^20812908982 is an apocalyptic number.

20812908982 is a deficient number, since it is larger than the sum of its proper divisors (10406454494).

20812908982 is a wasteful number, since it uses less digits than its factorization.

20812908982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10406454493.

The product of its (nonzero) digits is 331776, while the sum is 49.

The spelling of 20812908982 in words is "twenty billion, eight hundred twelve million, nine hundred eight thousand, nine hundred eighty-two".