19997652 has 48 divisors (see below), whose sum is σ = 49548800. Its totient is φ = 6259680.

The previous prime is 19997641. The next prime is 19997657. The reversal of 19997652 is 25679991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19997657) 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 15 ways as a sum of consecutive naturals, for example, 31377 + ... + 32007.

Almost surely, 2^19997652 is an apocalyptic number.

19997652 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 19997652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24774400).

19997652 is an abundant number, since it is smaller than the sum of its proper divisors (29551148).

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

19997652 is a wasteful number, since it uses less digits than its factorization.

19997652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796 (or 794 counting only the distinct ones).

The product of its digits is 306180, while the sum is 48.

The square root of 19997652 is about 4471.8734329138. The cubic root of 19997652 is about 271.4311388228.

It can be divided in two parts, 199976 and 52, that added together give a triangular number (200028 = T₆₃₂).

The spelling of 19997652 in words is "nineteen million, nine hundred ninety-seven thousand, six hundred fifty-two".