19139825 has 24 divisors (see below), whose sum is σ = 24748416. Its totient is φ = 14672000.

The previous prime is 19139819. The next prime is 19139833. The reversal of 19139825 is 52893191.

It is not a de Polignac number, because 19139825 - 2¹² = 19135729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72644 + ... + 72906.

It is an arithmetic number, because the mean of its divisors is an integer number (1031184).

Almost surely, 2^19139825 is an apocalyptic number.

It is an amenable number.

19139825 is a deficient number, since it is larger than the sum of its proper divisors (5608591).

19139825 is a wasteful number, since it uses less digits than its factorization.

19139825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 380 counting only the distinct ones).

The product of its digits is 19440, while the sum is 38.

The square root of 19139825 is about 4374.9085704732. The cubic root of 19139825 is about 267.4931433302.

The spelling of 19139825 in words is "nineteen million, one hundred thirty-nine thousand, eight hundred twenty-five".