19828655 has 16 divisors (see below), whose sum is σ = 29666304. Its totient is φ = 12360480.

The previous prime is 19828649. The next prime is 19828657. The reversal of 19828655 is 55682891.

It is not a de Polignac number, because 19828655 - 2⁶ = 19828591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19828657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25367 + ... + 26136.

It is an arithmetic number, because the mean of its divisors is an integer number (1854144).

Almost surely, 2^19828655 is an apocalyptic number.

19828655 is a deficient number, since it is larger than the sum of its proper divisors (9837649).

19828655 is a wasteful number, since it uses less digits than its factorization.

19828655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51526.

The product of its digits is 172800, while the sum is 44.

The square root of 19828655 is about 4452.9377943106. The cubic root of 19828655 is about 270.6643675606.

The spelling of 19828655 in words is "nineteen million, eight hundred twenty-eight thousand, six hundred fifty-five".