19780623600 has 120 divisors (see below), whose sum is σ = 63397815792. Its totient is φ = 5272012800.

The previous prime is 19780623593. The next prime is 19780623677. The reversal of 19780623600 is 632608791.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

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, 3228540 + ... + 3234660.

Almost surely, 2^19780623600 is an apocalyptic number.

19780623600 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 19780623600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31698907896).

19780623600 is an abundant number, since it is smaller than the sum of its proper divisors (43617192192).

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

19780623600 is a wasteful number, since it uses less digits than its factorization.

19780623600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8835 (or 8824 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 19780623600 in words is "nineteen billion, seven hundred eighty million, six hundred twenty-three thousand, six hundred".