19540164 has 24 divisors (see below), whose sum is σ = 52107328. Its totient is φ = 5582880.

The previous prime is 19540163. The next prime is 19540187. The reversal of 19540164 is 46104591.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19540163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116227 + ... + 116394.

Almost surely, 2^19540164 is an apocalyptic number.

19540164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19540164 is an abundant number, since it is smaller than the sum of its proper divisors (32567164).

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

19540164 is a wasteful number, since it uses less digits than its factorization.

19540164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232635 (or 232633 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 19540164 is about 4420.4257713483. The cubic root of 19540164 is about 269.3452999018.

The spelling of 19540164 in words is "nineteen million, five hundred forty thousand, one hundred sixty-four".