204030023213421 has 32 divisors (see below), whose sum is σ = 302803354828800. Its totient is φ = 135778529871360.

The previous prime is 204030023213323. The next prime is 204030023213441. The reversal of 204030023213421 is 124312320030402.

204030023213421 is a `hidden beast` number, since 2 + 0 + 4 + 0 + 3 + 0 + 0 + 23 + 213 + 421 = 666.

It is not a de Polignac number, because 204030023213421 - 2¹⁴ = 204030023197037 is a prime.

It is a super-2 number, since 2×204030023213421² (a number of 29 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204030023213441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1369337236 + ... + 1369486226.

It is an arithmetic number, because the mean of its divisors is an integer number (9462604838400).

Almost surely, 2^{204030023213421} is an apocalyptic number.

It is an amenable number.

204030023213421 is a deficient number, since it is larger than the sum of its proper divisors (98773331615379).

204030023213421 is a wasteful number, since it uses less digits than its factorization.

204030023213421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238706 (or 238700 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 204030023213421 its reverse (124312320030402), we get a palindrome (328342343243823).

The spelling of 204030023213421 in words is "two hundred four trillion, thirty billion, twenty-three million, two hundred thirteen thousand, four hundred twenty-one".