20908453008 has 40 divisors (see below), whose sum is σ = 54145616800. Its totient is φ = 6952437504.

The previous prime is 20908453001. The next prime is 20908453009. The reversal of 20908453008 is 80035480902.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20908453001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512878 + ... + 552141.

It is an arithmetic number, because the mean of its divisors is an integer number (1353640420).

Almost surely, 2^20908453008 is an apocalyptic number.

It is an amenable number.

20908453008 is an abundant number, since it is smaller than the sum of its proper divisors (33237163792).

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

20908453008 is a wasteful number, since it uses less digits than its factorization.

20908453008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065439 (or 1065433 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 20908453008 in words is "twenty billion, nine hundred eight million, four hundred fifty-three thousand, eight".