19957104 has 140 divisors (see below), whose sum is σ = 60989400. Its totient is φ = 6314112.

The previous prime is 19957103. The next prime is 19957111. The reversal of 19957104 is 40175991.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19957103) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 338227 + ... + 338285.

Almost surely, 2^19957104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19957104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30494700).

19957104 is an abundant number, since it is smaller than the sum of its proper divisors (41032296).

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

19957104 is an equidigital number, since it uses as much as digits as its factorization.

19957104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 19957104 is about 4467.3374620684. The cubic root of 19957104 is about 271.2475599885.

The spelling of 19957104 in words is "nineteen million, nine hundred fifty-seven thousand, one hundred four".