19446956144 has 120 divisors (see below), whose sum is σ = 47921040000. Its totient is φ = 7559879040.

The previous prime is 19446956143. The next prime is 19446956189. The reversal of 19446956144 is 44165964491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19446956143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4301117 + ... + 4305635.

It is an arithmetic number, because the mean of its divisors is an integer number (399342000).

Almost surely, 2^19446956144 is an apocalyptic number.

19446956144 is a gapful number since it is divisible by the number (14) 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 19446956144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23960520000).

19446956144 is an abundant number, since it is smaller than the sum of its proper divisors (28474083856).

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

19446956144 is a wasteful number, since it uses less digits than its factorization.

19446956144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5051 (or 5038 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 53.

The spelling of 19446956144 in words is "nineteen billion, four hundred forty-six million, nine hundred fifty-six thousand, one hundred forty-four".