19620420 has 24 divisors (see below), whose sum is σ = 54937344. Its totient is φ = 5232096.

The previous prime is 19620389. The next prime is 19620437. The reversal of 19620420 is 2402691.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163444 + ... + 163563.

It is an arithmetic number, because the mean of its divisors is an integer number (2289056).

Almost surely, 2^19620420 is an apocalyptic number.

19620420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19620420 is an abundant number, since it is smaller than the sum of its proper divisors (35316924).

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

19620420 is a wasteful number, since it uses less digits than its factorization.

19620420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327019 (or 327017 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 19620420 is about 4429.4943277986. The cubic root of 19620420 is about 269.7135508023.

The spelling of 19620420 in words is "nineteen million, six hundred twenty thousand, four hundred twenty".