23213401605 has 40 divisors (see below), whose sum is σ = 41631955992. Its totient is φ = 12374595072.

The previous prime is 23213401529. The next prime is 23213401667. The reversal of 23213401605 is 50610431232.

23213401605 is a `hidden beast` number, since 2 + 3 + 2 + 13 + 40 + 1 + 605 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3926024964 + 19287376641 = 62658^2 + 138879^2 .

It is not a de Polignac number, because 23213401605 - 2¹² = 23213397509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 917809 + ... + 942761.

Almost surely, 2^23213401605 is an apocalyptic number.

It is an amenable number.

23213401605 is a deficient number, since it is larger than the sum of its proper divisors (18418554387).

23213401605 is a wasteful number, since it uses less digits than its factorization.

23213401605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27267 (or 27258 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 23213401605 its reverse (50610431232), we get a palindrome (73823832837).

The spelling of 23213401605 in words is "twenty-three billion, two hundred thirteen million, four hundred one thousand, six hundred five".