19625448420 has 96 divisors (see below), whose sum is σ = 61121088000. Its totient is φ = 5227955712.

The previous prime is 19625448419. The next prime is 19625448439. The reversal of 19625448420 is 2484452691.

It is a happy number.

19625448420 is a `hidden beast` number, since 1 + 9 + 6 + 2 + 544 + 84 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 508981 + ... + 546179.

It is an arithmetic number, because the mean of its divisors is an integer number (636678000).

Almost surely, 2^19625448420 is an apocalyptic number.

19625448420 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 19625448420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30560544000).

19625448420 is an abundant number, since it is smaller than the sum of its proper divisors (41495639580).

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

19625448420 is a wasteful number, since it uses less digits than its factorization.

19625448420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38194 (or 38186 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 19625448420 in words is "nineteen billion, six hundred twenty-five million, four hundred forty-eight thousand, four hundred twenty".