19138545 has 16 divisors (see below), whose sum is σ = 34024320. Its totient is φ = 10207152.

The previous prime is 19138531. The next prime is 19138571. The reversal of 19138545 is 54583191.

It is not a de Polignac number, because 19138545 - 2⁷ = 19138417 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70749 + ... + 71018.

It is an arithmetic number, because the mean of its divisors is an integer number (2126520).

Almost surely, 2^19138545 is an apocalyptic number.

19138545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19138545 is a deficient number, since it is larger than the sum of its proper divisors (14885775).

19138545 is a wasteful number, since it uses less digits than its factorization.

19138545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141781 (or 141775 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 19138545 is about 4374.7622792559. The cubic root of 19138545 is about 267.4871802166.

It can be divided in two parts, 19138 and 545, that added together give a 9-th power (19683 = 3⁹).

The spelling of 19138545 in words is "nineteen million, one hundred thirty-eight thousand, five hundred forty-five".