20448479454 has 32 divisors (see below), whose sum is σ = 44065117824. Its totient is φ = 6288662880.

The previous prime is 20448479437. The next prime is 20448479479. The reversal of 20448479454 is 45497484402.

It is a junction number, because it is equal to n+sod(n) for n = 20448479397 and 20448479406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91677 + ... + 222039.

It is an arithmetic number, because the mean of its divisors is an integer number (1377034932).

Almost surely, 2^20448479454 is an apocalyptic number.

20448479454 is an abundant number, since it is smaller than the sum of its proper divisors (23616638370).

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

20448479454 is a wasteful number, since it uses less digits than its factorization.

20448479454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132392.

The product of its (nonzero) digits is 5160960, while the sum is 51.

The spelling of 20448479454 in words is "twenty billion, four hundred forty-eight million, four hundred seventy-nine thousand, four hundred fifty-four".