20449419480 has 192 divisors, whose sum is σ = 76316947200. Its totient is φ = 4651879680.

The previous prime is 20449419479. The next prime is 20449419533. The reversal of 20449419480 is 8491494402.

20449419480 is a `hidden beast` number, since 2 + 0 + 449 + 41 + 94 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 512491 + ... + 550949.

It is an arithmetic number, because the mean of its divisors is an integer number (397484100).

Almost surely, 2^20449419480 is an apocalyptic number.

20449419480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20449419480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38158473600).

20449419480 is an abundant number, since it is smaller than the sum of its proper divisors (55867527720).

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

20449419480 is a wasteful number, since it uses less digits than its factorization.

20449419480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38694 (or 38687 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 20449419480 in words is "twenty billion, four hundred forty-nine million, four hundred nineteen thousand, four hundred eighty".