23154020244 has 18 divisors (see below), whose sum is σ = 58528217930. Its totient is φ = 7718006736.

The previous prime is 23154020237. The next prime is 23154020251. The reversal of 23154020244 is 44202045132.

23154020244 is a `hidden beast` number, since 2 + 3 + 15 + 402 + 0 + 244 = 666.

It is an interprime number because it is at equal distance from previous prime (23154020237) and next prime (23154020251).

It can be written as a sum of positive squares in only one way, i.e., 19906388100 + 3247632144 = 141090^2 + 56988^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×23154020244² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 321583579 + ... + 321583650.

Almost surely, 2^23154020244 is an apocalyptic number.

It is an amenable number.

23154020244 is an abundant number, since it is smaller than the sum of its proper divisors (35374197686).

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

23154020244 is a wasteful number, since it uses less digits than its factorization.

23154020244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643167239 (or 643167234 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 23154020244 its reverse (44202045132), we get a palindrome (67356065376).

The spelling of 23154020244 in words is "twenty-three billion, one hundred fifty-four million, twenty thousand, two hundred forty-four".