19814420 has 24 divisors (see below), whose sum is σ = 41779584. Its totient is φ = 7893536.

The previous prime is 19814387. The next prime is 19814429. The reversal of 19814420 is 2441891.

It is a super-3 number, since 3×19814420³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19814429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3377 + ... + 7143.

It is an arithmetic number, because the mean of its divisors is an integer number (1740816).

Almost surely, 2^19814420 is an apocalyptic number.

19814420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19814420 is an abundant number, since it is smaller than the sum of its proper divisors (21965164).

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

19814420 is a wasteful number, since it uses less digits than its factorization.

19814420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039 (or 4037 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 19814420 is about 4451.3391243535. The cubic root of 19814420 is about 270.5995820328.

The spelling of 19814420 in words is "nineteen million, eight hundred fourteen thousand, four hundred twenty".