19489053402 has 384 divisors, whose sum is σ = 57605603328. Its totient is φ = 4615833600.

The previous prime is 19489053391. The next prime is 19489053457. The reversal of 19489053402 is 20435098491.

19489053402 is a `hidden beast` number, since 194 + 8 + 9 + 0 + 53 + 402 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 92365077 + ... + 92365287.

It is an arithmetic number, because the mean of its divisors is an integer number (150014592).

Almost surely, 2^19489053402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19489053402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28802801664).

19489053402 is an abundant number, since it is smaller than the sum of its proper divisors (38116549926).

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

19489053402 is a wasteful number, since it uses less digits than its factorization.

19489053402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 19489053402 in words is "nineteen billion, four hundred eighty-nine million, fifty-three thousand, four hundred two".