21485148677093 has 2 divisors, whose sum is σ = 21485148677094. Its totient is φ = 21485148677092.

The previous prime is 21485148677021. The next prime is 21485148677171. The reversal of 21485148677093 is 39077684158412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14799578268484 + 6685570408609 = 3847022^2 + 2585647^2 .

It is a cyclic number.

It is not a de Polignac number, because 21485148677093 - 2¹⁶ = 21485148611557 is a prime.

It is a super-2 number, since 2×21485148677093² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21485148677693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10742574338546 + 10742574338547.

It is an arithmetic number, because the mean of its divisors is an integer number (10742574338547).

It is a 2-persistent number, because it is pandigital, and so is 2⋅21485148677093 = 42970297354186, but 3⋅21485148677093 = 64455446031279 is not.

Almost surely, 2^{21485148677093} is an apocalyptic number.

It is an amenable number.

21485148677093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21485148677093 is an equidigital number, since it uses as much as digits as its factorization.

21485148677093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81285120, while the sum is 65.

The spelling of 21485148677093 in words is "twenty-one trillion, four hundred eighty-five billion, one hundred forty-eight million, six hundred seventy-seven thousand, ninety-three".