19896420 has 96 divisors (see below), whose sum is σ = 60641280. Its totient is φ = 4855680.

The previous prime is 19896419. The next prime is 19896427. The reversal of 19896420 is 2469891.

It is not an unprimeable number, because it can be changed into a prime (19896427) 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, 35059 + ... + 35621.

It is an arithmetic number, because the mean of its divisors is an integer number (631680).

Almost surely, 2^19896420 is an apocalyptic number.

19896420 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 19896420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30320640).

19896420 is an abundant number, since it is smaller than the sum of its proper divisors (40744860).

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

19896420 is a wasteful number, since it uses less digits than its factorization.

19896420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 19896420 is about 4460.5403260143. The cubic root of 19896420 is about 270.9723514047.

The spelling of 19896420 in words is "nineteen million, eight hundred ninety-six thousand, four hundred twenty".