19996860 has 96 divisors (see below), whose sum is σ = 62318592. Its totient is φ = 4757760.

The previous prime is 19996859. The next prime is 19996861. The reversal of 19996860 is 6869991.

It is an interprime number because it is at equal distance from previous prime (19996859) and next prime (19996861).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19996861) 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, 23767 + ... + 24593.

It is an arithmetic number, because the mean of its divisors is an integer number (649152).

Almost surely, 2^19996860 is an apocalyptic number.

19996860 is a gapful number since it is divisible by the number (10) 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 19996860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31159296).

19996860 is an abundant number, since it is smaller than the sum of its proper divisors (42321732).

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

19996860 is a wasteful number, since it uses less digits than its factorization.

19996860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 19996860 is about 4471.7848785468. The cubic root of 19996860 is about 271.4275554638.

It can be divided in two parts, 199968 and 60, that added together give a triangular number (200028 = T₆₃₂).

The spelling of 19996860 in words is "nineteen million, nine hundred ninety-six thousand, eight hundred sixty".