19418941456 has 10 divisors (see below), whose sum is σ = 37624199102. Its totient is φ = 9709470720.

The previous prime is 19418941453. The next prime is 19418941457. The reversal of 19418941456 is 65414981491.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18202327056 + 1216614400 = 134916^2 + 34880^2 .

It is not an unprimeable number, because it can be changed into a prime (19418941453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606841905 + ... + 606841936.

Almost surely, 2^19418941456 is an apocalyptic number.

19418941456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19418941456 is a deficient number, since it is larger than the sum of its proper divisors (18205257646).

19418941456 is a wasteful number, since it uses less digits than its factorization.

19418941456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213683849 (or 1213683843 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 52.

The spelling of 19418941456 in words is "nineteen billion, four hundred eighteen million, nine hundred forty-one thousand, four hundred fifty-six".