19621382004 has 168 divisors, whose sum is σ = 61935151040. Its totient is φ = 5310945792.

The previous prime is 19621381993. The next prime is 19621382047. The reversal of 19621382004 is 40028312691.

19621382004 is a `hidden beast` number, since 1 + 9 + 621 + 3 + 8 + 20 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 19621382004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 362532 + ... + 413124.

Almost surely, 2^19621382004 is an apocalyptic number.

19621382004 is a gapful number since it is divisible by the number (14) 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 19621382004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30967575520).

19621382004 is an abundant number, since it is smaller than the sum of its proper divisors (42313769036).

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

19621382004 is a wasteful number, since it uses less digits than its factorization.

19621382004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50641 (or 50624 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

Adding to 19621382004 its reverse (40028312691), we get a palindrome (59649694695).

The spelling of 19621382004 in words is "nineteen billion, six hundred twenty-one million, three hundred eighty-two thousand, four".