19749708 has 72 divisors (see below), whose sum is σ = 55547856. Its totient is φ = 5865600.

The previous prime is 19749707. The next prime is 19749727. The reversal of 19749708 is 80794791.

It is not an unprimeable number, because it can be changed into a prime (19749707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20518 + ... + 21458.

It is an arithmetic number, because the mean of its divisors is an integer number (771498).

Almost surely, 2^19749708 is an apocalyptic number.

19749708 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19749708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27773928).

19749708 is an abundant number, since it is smaller than the sum of its proper divisors (35798148).

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

19749708 is a wasteful number, since it uses less digits than its factorization.

19749708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015 (or 1010 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 19749708 is about 4444.0643559697. The cubic root of 19749708 is about 270.3046766399.

The spelling of 19749708 in words is "nineteen million, seven hundred forty-nine thousand, seven hundred eight".