19894980481 has 8 divisors (see below), whose sum is σ = 20563862400. Its totient is φ = 19237154640.

The previous prime is 19894980463. The next prime is 19894980493. The reversal of 19894980481 is 18408949891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19894980481 - 2⁵ = 19894980449 is a prime.

It is a super-2 number, since 2×19894980481² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19894983481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2760361 + ... + 2767558.

It is an arithmetic number, because the mean of its divisors is an integer number (2570482800).

Almost surely, 2^19894980481 is an apocalyptic number.

It is an amenable number.

19894980481 is a deficient number, since it is larger than the sum of its proper divisors (668881919).

19894980481 is an equidigital number, since it uses as much as digits as its factorization.

19894980481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5528039.

The product of its (nonzero) digits is 5971968, while the sum is 61.

The spelling of 19894980481 in words is "nineteen billion, eight hundred ninety-four million, nine hundred eighty thousand, four hundred eighty-one".