20430233756261 has 8 divisors (see below), whose sum is σ = 23352441290304. Its totient is φ = 17508926900160.

The previous prime is 20430233756237. The next prime is 20430233756299. The reversal of 20430233756261 is 16265733203402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20430233756261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430233756461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225120875 + ... + 225211608.

It is an arithmetic number, because the mean of its divisors is an integer number (2919055161288).

Almost surely, 2^{20430233756261} is an apocalyptic number.

It is an amenable number.

20430233756261 is a deficient number, since it is larger than the sum of its proper divisors (2922207534043).

20430233756261 is an equidigital number, since it uses as much as digits as its factorization.

20430233756261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450338971.

The product of its (nonzero) digits is 1088640, while the sum is 44.

Adding to 20430233756261 its reverse (16265733203402), we get a palindrome (36695966959663).

The spelling of 20430233756261 in words is "twenty trillion, four hundred thirty billion, two hundred thirty-three million, seven hundred fifty-six thousand, two hundred sixty-one".