19746420 has 96 divisors (see below), whose sum is σ = 59270400. Its totient is φ = 4899840.

The previous prime is 19746413. The next prime is 19746431. The reversal of 19746420 is 2464791.

It is a happy number.

It is a super-2 number, since 2×19746420² = 779842205632800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56406 + ... + 56754.

It is an arithmetic number, because the mean of its divisors is an integer number (617400).

Almost surely, 2^19746420 is an apocalyptic number.

19746420 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 19746420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29635200).

19746420 is an abundant number, since it is smaller than the sum of its proper divisors (39523980).

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

19746420 is a wasteful number, since it uses less digits than its factorization.

19746420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 19746420 is about 4443.6944089350. The cubic root of 19746420 is about 270.2896753869.

The spelling of 19746420 in words is "nineteen million, seven hundred forty-six thousand, four hundred twenty".