19804002420 has 24 divisors (see below), whose sum is σ = 55451206944. Its totient is φ = 5281067296.

The previous prime is 19804002377. The next prime is 19804002469. The reversal of 19804002420 is 2420040891.

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

It is a congruent number.

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, 165033294 + ... + 165033413.

It is an arithmetic number, because the mean of its divisors is an integer number (2310466956).

Almost surely, 2^19804002420 is an apocalyptic number.

19804002420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19804002420 is an abundant number, since it is smaller than the sum of its proper divisors (35647204524).

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

19804002420 is a wasteful number, since it uses less digits than its factorization.

19804002420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330066719 (or 330066717 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The spelling of 19804002420 in words is "nineteen billion, eight hundred four million, two thousand, four hundred twenty".