19497340 has 12 divisors (see below), whose sum is σ = 40944456. Its totient is φ = 7798928.

The previous prime is 19497337. The next prime is 19497347. The reversal of 19497340 is 4379491.

It is a self number, because there is not a number n which added to its sum of digits gives 19497340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19497347) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 487414 + ... + 487453.

It is an arithmetic number, because the mean of its divisors is an integer number (3412038).

Almost surely, 2^19497340 is an apocalyptic number.

19497340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19497340 is an abundant number, since it is smaller than the sum of its proper divisors (21447116).

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

19497340 is a wasteful number, since it uses less digits than its factorization.

19497340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974876 (or 974874 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 19497340 is about 4415.5792372009. The cubic root of 19497340 is about 269.1483912909.

The spelling of 19497340 in words is "nineteen million, four hundred ninety-seven thousand, three hundred forty".