20732420966400 has 3456 divisors, whose sum is σ = 92906873579520. Its totient is φ = 4514807808000.

The previous prime is 20732420966393. The next prime is 20732420966401. The reversal of 20732420966400 is 466902423702.

20732420966400 is a `hidden beast` number, since 2 + 0 + 7 + 32 + 4 + 209 + 6 + 6 + 400 = 666.

It is a tau number, because it is divible by the number of its divisors (3456).

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

It is not an unprimeable number, because it can be changed into a prime (20732420966401) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 76503398265 + ... + 76503398535.

It is an arithmetic number, because the mean of its divisors is an integer number (26882775920).

Almost surely, 2^{20732420966400} is an apocalyptic number.

20732420966400 is a gapful number since it is divisible by the number (20) 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 20732420966400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46453436789760).

20732420966400 is an abundant number, since it is smaller than the sum of its proper divisors (72174452613120).

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

20732420966400 is a wasteful number, since it uses less digits than its factorization.

20732420966400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 20732420966400 in words is "twenty trillion, seven hundred thirty-two billion, four hundred twenty million, nine hundred sixty-six thousand, four hundred".