19204669440 has 504 divisors, whose sum is σ = 74591466768. Its totient is φ = 4529848320.

The previous prime is 19204669433. The next prime is 19204669457. The reversal of 19204669440 is 4496640291.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 519045102 + ... + 519045138.

It is an arithmetic number, because the mean of its divisors is an integer number (147998942).

Almost surely, 2^19204669440 is an apocalyptic number.

19204669440 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 19204669440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37295733384).

19204669440 is an abundant number, since it is smaller than the sum of its proper divisors (55386797328).

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

19204669440 is an frugal number, since it uses more digits than its factorization.

19204669440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 19204669440 in words is "nineteen billion, two hundred four million, six hundred sixty-nine thousand, four hundred forty".