19941420 has 48 divisors (see below), whose sum is σ = 56206080. Its totient is φ = 5282496.

The previous prime is 19941419. The next prime is 19941433. The reversal of 19941420 is 2414991.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8761 + ... + 10799.

It is an arithmetic number, because the mean of its divisors is an integer number (1170960).

Almost surely, 2^19941420 is an apocalyptic number.

19941420 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 19941420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28103040).

19941420 is an abundant number, since it is smaller than the sum of its proper divisors (36264660).

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

19941420 is a wasteful number, since it uses less digits than its factorization.

19941420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214 (or 2212 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 19941420 is about 4465.5817090274. The cubic root of 19941420 is about 271.1764848521.

The spelling of 19941420 in words is "nineteen million, nine hundred forty-one thousand, four hundred twenty".