20459276693440 has 672 divisors, whose sum is σ = 58586655536640. Its totient is φ = 6750512676864.

The previous prime is 20459276693437. The next prime is 20459276693483. The reversal of 20459276693440 is 4439667295402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3843558619 + ... + 3843563941.

It is an arithmetic number, because the mean of its divisors is an integer number (87182523120).

Almost surely, 2^{20459276693440} is an apocalyptic number.

20459276693440 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 20459276693440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29293327768320).

20459276693440 is an abundant number, since it is smaller than the sum of its proper divisors (38127378843200).

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

20459276693440 is a wasteful number, since it uses less digits than its factorization.

20459276693440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5549 (or 5522 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 61.

The spelling of 20459276693440 in words is "twenty trillion, four hundred fifty-nine billion, two hundred seventy-six million, six hundred ninety-three thousand, four hundred forty".