20846412155520 has 1536 divisors, whose sum is σ = 90098683084800. Its totient is φ = 4333100728320.

The previous prime is 20846412155479. The next prime is 20846412155551. The reversal of 20846412155520 is 2555121464802.

20846412155520 is a `hidden beast` number, since 2 + 0 + 8 + 4 + 64 + 12 + 1 + 55 + 520 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2545034625 + ... + 2545042815.

It is an arithmetic number, because the mean of its divisors is an integer number (58657996800).

Almost surely, 2^{20846412155520} is an apocalyptic number.

20846412155520 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 20846412155520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45049341542400).

20846412155520 is an abundant number, since it is smaller than the sum of its proper divisors (69252270929280).

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

20846412155520 is a wasteful number, since it uses less digits than its factorization.

20846412155520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8366 (or 8351 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 45.

The spelling of 20846412155520 in words is "twenty trillion, eight hundred forty-six billion, four hundred twelve million, one hundred fifty-five thousand, five hundred twenty".