19059459136 has 21 divisors (see below), whose sum is σ = 37823305989. Its totient is φ = 9529177344.

The previous prime is 19059459131. The next prime is 19059459157. The reversal of 19059459136 is 63195495091.

It is a happy number.

The square root of 19059459136 is 138056.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 633025600 + 18426433536 = 25160^2 + 135744^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19059459131) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1095820 + ... + 1113076.

It is an arithmetic number, because the mean of its divisors is an integer number (1801109809).

Almost surely, 2^19059459136 is an apocalyptic number.

19059459136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

19059459136 is the 138056-th square number.

It is an amenable number.

19059459136 is a deficient number, since it is larger than the sum of its proper divisors (18763846853).

19059459136 is an frugal number, since it uses more digits than its factorization.

19059459136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34526 (or 17259 counting only the distinct ones).

The product of its (nonzero) digits is 1312200, while the sum is 52.

The spelling of 19059459136 in words is "nineteen billion, fifty-nine million, four hundred fifty-nine thousand, one hundred thirty-six".