21423528408068 has 6 divisors (see below), whose sum is σ = 37491174714126. Its totient is φ = 10711764204032.

The previous prime is 21423528408053. The next prime is 21423528408133. The reversal of 21423528408068 is 86080482532412.

It can be written as a sum of positive squares in only one way, i.e., 19401012096964 + 2022516311104 = 4404658^2 + 1422152^2 .

It is a super-2 number, since 2×21423528408068² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2677941051005 + ... + 2677941051012.

It is an arithmetic number, because the mean of its divisors is an integer number (6248529119021).

Almost surely, 2^{21423528408068} is an apocalyptic number.

It is an amenable number.

21423528408068 is a deficient number, since it is larger than the sum of its proper divisors (16067646306058).

21423528408068 is a wasteful number, since it uses less digits than its factorization.

21423528408068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355882102021 (or 5355882102019 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 53.

The spelling of 21423528408068 in words is "twenty-one trillion, four hundred twenty-three billion, five hundred twenty-eight million, four hundred eight thousand, sixty-eight".