20154002431 has 2 divisors, whose sum is σ = 20154002432. Its totient is φ = 20154002430.

The previous prime is 20154002417. The next prime is 20154002447. The reversal of 20154002431 is 13420045102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20154002431 - 2¹⁹ = 20153478143 is a prime.

It is a super-2 number, since 2×20154002431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20154002831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10077001215 + 10077001216.

It is an arithmetic number, because the mean of its divisors is an integer number (10077001216).

Almost surely, 2^20154002431 is an apocalyptic number.

20154002431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20154002431 is an equidigital number, since it uses as much as digits as its factorization.

20154002431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 20154002431 its reverse (13420045102), we get a palindrome (33574047533).

The spelling of 20154002431 in words is "twenty billion, one hundred fifty-four million, two thousand, four hundred thirty-one".