20449366323840 has 896 divisors, whose sum is σ = 75988001387520. Its totient is φ = 5255720017920.

The previous prime is 20449366323823. The next prime is 20449366323863. The reversal of 20449366323840 is 4832366394402.

20449366323840 is a `hidden beast` number, since 2 + 0 + 4 + 4 + 9 + 366 + 3 + 238 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 1847105505 + ... + 1847116575.

Almost surely, 2^{20449366323840} is an apocalyptic number.

20449366323840 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 20449366323840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37994000693760).

20449366323840 is an abundant number, since it is smaller than the sum of its proper divisors (55538635063680).

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

20449366323840 is a wasteful number, since it uses less digits than its factorization.

20449366323840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11252 (or 11225 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 54.

The spelling of 20449366323840 in words is "twenty trillion, four hundred forty-nine billion, three hundred sixty-six million, three hundred twenty-three thousand, eight hundred forty".