19708542 has 64 divisors (see below), whose sum is σ = 53015040. Its totient is φ = 5298048.

The previous prime is 19708541. The next prime is 19708543. The reversal of 19708542 is 24580791.

It is an interprime number because it is at equal distance from previous prime (19708541) and next prime (19708543).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 19708497 and 19708506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19708541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4893 + ... + 7959.

It is an arithmetic number, because the mean of its divisors is an integer number (828360).

Almost surely, 2^19708542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19708542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26507520).

19708542 is an abundant number, since it is smaller than the sum of its proper divisors (33306498).

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

19708542 is a wasteful number, since it uses less digits than its factorization.

19708542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102 (or 3096 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 19708542 is about 4439.4303688649. The cubic root of 19708542 is about 270.1167396416.

The spelling of 19708542 in words is "nineteen million, seven hundred eight thousand, five hundred forty-two".