21455473163152 has 360 divisors, whose sum is σ = 52209299640960. Its totient is φ = 8513515745280.

The previous prime is 21455473163087. The next prime is 21455473163287. The reversal of 21455473163152 is 25136137455412.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 21455473163096 and 21455473163105.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5244552627 + ... + 5244556717.

It is an arithmetic number, because the mean of its divisors is an integer number (145025832336).

Almost surely, 2^{21455473163152} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21455473163152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26104649820480).

21455473163152 is an abundant number, since it is smaller than the sum of its proper divisors (30753826477808).

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

21455473163152 is a wasteful number, since it uses less digits than its factorization.

21455473163152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4519 (or 4489 counting only the distinct ones).

The product of its digits is 3024000, while the sum is 49.

The spelling of 21455473163152 in words is "twenty-one trillion, four hundred fifty-five billion, four hundred seventy-three million, one hundred sixty-three thousand, one hundred fifty-two".