19797100 has 18 divisors (see below), whose sum is σ = 42959924. Its totient is φ = 7918800.

The previous prime is 19797097. The next prime is 19797101. The reversal of 19797100 is 179791.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19797101) 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 5 ways as a sum of consecutive naturals, for example, 98886 + ... + 99085.

Almost surely, 2^19797100 is an apocalyptic number.

19797100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19797100 is an abundant number, since it is smaller than the sum of its proper divisors (23162824).

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

19797100 is a wasteful number, since it uses less digits than its factorization.

19797100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197985 (or 197978 counting only the distinct ones).

The product of its (nonzero) digits is 3969, while the sum is 34.

The square root of 19797100 is about 4449.3932170578. The cubic root of 19797100 is about 270.5207143695.

The spelling of 19797100 in words is "nineteen million, seven hundred ninety-seven thousand, one hundred".