21226489145 has 32 divisors (see below), whose sum is σ = 26013778560. Its totient is φ = 16624650240.

The previous prime is 21226489133. The next prime is 21226489183. The reversal of 21226489145 is 54198462212.

It is not a de Polignac number, because 21226489145 - 2¹⁰ = 21226488121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21226489096 and 21226489105.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31077974 + ... + 31078656.

It is an arithmetic number, because the mean of its divisors is an integer number (812930580).

Almost surely, 2^21226489145 is an apocalyptic number.

It is an amenable number.

21226489145 is a deficient number, since it is larger than the sum of its proper divisors (4787289415).

21226489145 is a wasteful number, since it uses less digits than its factorization.

21226489145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385.

The product of its digits is 276480, while the sum is 44.

The spelling of 21226489145 in words is "twenty-one billion, two hundred twenty-six million, four hundred eighty-nine thousand, one hundred forty-five".