20606861246400 has 2520 divisors, whose sum is σ = 90234157547072. Its totient is φ = 4581992448000.

The previous prime is 20606861246371. The next prime is 20606861246401. The reversal of 20606861246400 is 464216860602.

20606861246400 is a `hidden beast` number, since 2 + 0 + 60 + 68 + 6 + 124 + 6 + 400 = 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 (20606861246401) by changing a digit.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 55246276614 + ... + 55246276986.

Almost surely, 2^{20606861246400} is an apocalyptic number.

20606861246400 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 20606861246400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45117078773536).

20606861246400 is an abundant number, since it is smaller than the sum of its proper divisors (69627296300672).

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

20606861246400 is a wasteful number, since it uses less digits than its factorization.

20606861246400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 20606861246400 in words is "twenty trillion, six hundred six billion, eight hundred sixty-one million, two hundred forty-six thousand, four hundred".