20449954512 has 180 divisors, whose sum is σ = 63974012544. Its totient is φ = 6089091840.

The previous prime is 20449954507. The next prime is 20449954523. The reversal of 20449954512 is 21545994402.

20449954512 is a `hidden beast` number, since 2 + 0 + 4 + 4 + 99 + 545 + 12 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 740863 + ... + 767969.

Almost surely, 2^20449954512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20449954512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31987006272).

20449954512 is an abundant number, since it is smaller than the sum of its proper divisors (43524058032).

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

20449954512 is a wasteful number, since it uses less digits than its factorization.

20449954512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27178 (or 27156 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 20449954512 in words is "twenty billion, four hundred forty-nine million, nine hundred fifty-four thousand, five hundred twelve".