20448408820 has 24 divisors (see below), whose sum is σ = 49076181504. Its totient is φ = 7010882976.

The previous prime is 20448408791. The next prime is 20448408907. The reversal of 20448408820 is 2880484402.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 73029892 + ... + 73030171.

It is an arithmetic number, because the mean of its divisors is an integer number (2044840896).

Almost surely, 2^20448408820 is an apocalyptic number.

20448408820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20448408820 is an abundant number, since it is smaller than the sum of its proper divisors (28627772684).

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

20448408820 is a wasteful number, since it uses less digits than its factorization.

20448408820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146060079 (or 146060077 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 40.

The spelling of 20448408820 in words is "twenty billion, four hundred forty-eight million, four hundred eight thousand, eight hundred twenty".