20154264539 has 2 divisors, whose sum is σ = 20154264540. Its totient is φ = 20154264538.

The previous prime is 20154264509. The next prime is 20154264553. The reversal of 20154264539 is 93546245102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20154264539 - 2⁸ = 20154264283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20154264496 and 20154264505.

It is not a weakly prime, because it can be changed into another prime (20154264509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10077132269 + 10077132270.

It is an arithmetic number, because the mean of its divisors is an integer number (10077132270).

Almost surely, 2^20154264539 is an apocalyptic number.

20154264539 is a deficient number, since it is larger than the sum of its proper divisors (1).

20154264539 is an equidigital number, since it uses as much as digits as its factorization.

20154264539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 20154264539 in words is "twenty billion, one hundred fifty-four million, two hundred sixty-four thousand, five hundred thirty-nine".