21475881347085 has 512 divisors, whose sum is σ = 44769588019200. Its totient is φ = 9670389120000.

The previous prime is 21475881347083. The next prime is 21475881347119. The reversal of 21475881347085 is 58074318857412.

21475881347085 is a `hidden beast` number, since 2 + 1 + 4 + 7 + 5 + 8 + 81 + 3 + 470 + 85 = 666.

It is not a de Polignac number, because 21475881347085 - 2¹ = 21475881347083 is a prime.

It is a super-2 number, since 2×21475881347085² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21475881347083) by changing a digit.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 32588590486 + ... + 32588591144.

It is an arithmetic number, because the mean of its divisors is an integer number (87440601600).

Almost surely, 2^{21475881347085} is an apocalyptic number.

It is an amenable number.

21475881347085 is an abundant number, since it is smaller than the sum of its proper divisors (23293706672115).

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

21475881347085 is a wasteful number, since it uses less digits than its factorization.

21475881347085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022 (or 1016 counting only the distinct ones).

The product of its (nonzero) digits is 60211200, while the sum is 63.

The spelling of 21475881347085 in words is "twenty-one trillion, four hundred seventy-five billion, eight hundred eighty-one million, three hundred forty-seven thousand, eighty-five".