19914407280 has 200 divisors, whose sum is σ = 69839538912. Its totient is φ = 5258774016.

The previous prime is 19914407267. The next prime is 19914407321. The reversal of 19914407280 is 8270441991.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 652522 + ... + 682358.

Almost surely, 2^19914407280 is an apocalyptic number.

19914407280 is a gapful number since it is divisible by the number (10) 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 19914407280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34919769456).

19914407280 is an abundant number, since it is smaller than the sum of its proper divisors (49925131632).

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

19914407280 is a wasteful number, since it uses less digits than its factorization.

19914407280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29965 (or 29950 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 19914407280 in words is "nineteen billion, nine hundred fourteen million, four hundred seven thousand, two hundred eighty".