12020783558400 has 324 divisors, whose sum is σ = 45505077613632. Its totient is φ = 3016980725760.

The previous prime is 12020783558341. The next prime is 12020783558401. The reversal of 12020783558400 is 485538702021.

12020783558400 is a `hidden beast` number, since 1 + 2 + 0 + 20 + 78 + 3 + 558 + 4 + 0 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020783558401) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5158864 + ... + 7117263.

Almost surely, 2^{12020783558400} is an apocalyptic number.

12020783558400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12020783558400 is an abundant number, since it is smaller than the sum of its proper divisors (33484294055232).

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

12020783558400 is a wasteful number, since it uses less digits than its factorization.

12020783558400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12276176 (or 12276154 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 12020783558400 in words is "twelve trillion, twenty billion, seven hundred eighty-three million, five hundred fifty-eight thousand, four hundred".