23154302421 has 6 divisors (see below), whose sum is σ = 33445103510. Its totient is φ = 15436201608.

The previous prime is 23154302383. The next prime is 23154302449. The reversal of 23154302421 is 12420345132.

23154302421 is a `hidden beast` number, since 2 + 315 + 4 + 302 + 42 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13159301796 + 9995000625 = 114714^2 + 99975^2 .

It is not a de Polignac number, because 23154302421 - 2¹⁵ = 23154269653 is a prime.

It is a super-2 number, since 2×23154302421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23154302461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1286350126 + ... + 1286350143.

Almost surely, 2^23154302421 is an apocalyptic number.

It is an amenable number.

23154302421 is a deficient number, since it is larger than the sum of its proper divisors (10290801089).

23154302421 is a wasteful number, since it uses less digits than its factorization.

23154302421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572700275 (or 2572700272 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 23154302421 its reverse (12420345132), we get a palindrome (35574647553).

The spelling of 23154302421 in words is "twenty-three billion, one hundred fifty-four million, three hundred two thousand, four hundred twenty-one".