19905136 has 20 divisors (see below), whose sum is σ = 39897000. Its totient is φ = 9609152.

The previous prime is 19905133. The next prime is 19905139. The reversal of 19905136 is 63150991.

It is an interprime number because it is at equal distance from previous prime (19905133) and next prime (19905139).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19905133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20986 + ... + 21913.

It is an arithmetic number, because the mean of its divisors is an integer number (1994850).

Almost surely, 2^19905136 is an apocalyptic number.

19905136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19905136 is an abundant number, since it is smaller than the sum of its proper divisors (19991864).

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

19905136 is a wasteful number, since it uses less digits than its factorization.

19905136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42936 (or 42930 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 19905136 is about 4461.5172307187. The cubic root of 19905136 is about 271.0119138020.

The spelling of 19905136 in words is "nineteen million, nine hundred five thousand, one hundred thirty-six".