19739952 has 90 divisors (see below), whose sum is σ = 57566132. Its totient is φ = 6314112.

The previous prime is 19739939. The next prime is 19739959. The reversal of 19739952 is 25993791.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19739898 and 19739907.

It is not an unprimeable number, because it can be changed into a prime (19739959) 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 17 ways as a sum of consecutive naturals, for example, 121023 + ... + 121185.

Almost surely, 2^19739952 is an apocalyptic number.

19739952 is a gapful number since it is divisible by the number (12) 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 19739952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28783066).

19739952 is an abundant number, since it is smaller than the sum of its proper divisors (37826180).

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

19739952 is a wasteful number, since it uses less digits than its factorization.

19739952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 197 counting only the distinct ones).

The product of its digits is 153090, while the sum is 45.

The square root of 19739952 is about 4442.9665765117. The cubic root of 19739952 is about 270.2601607620.

The spelling of 19739952 in words is "nineteen million, seven hundred thirty-nine thousand, nine hundred fifty-two".