20154254231 has 2 divisors, whose sum is σ = 20154254232. Its totient is φ = 20154254230.

The previous prime is 20154254227. The next prime is 20154254293. The reversal of 20154254231 is 13245245102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20154254231 - 2² = 20154254227 is a prime.

It is a super-2 number, since 2×20154254231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20154254194 and 20154254203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20154254431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10077127115 + 10077127116.

It is an arithmetic number, because the mean of its divisors is an integer number (10077127116).

Almost surely, 2^20154254231 is an apocalyptic number.

20154254231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20154254231 is an equidigital number, since it uses as much as digits as its factorization.

20154254231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 20154254231 its reverse (13245245102), we get a palindrome (33399499333).

The spelling of 20154254231 in words is "twenty billion, one hundred fifty-four million, two hundred fifty-four thousand, two hundred thirty-one".