12920354557 has 8 divisors (see below), whose sum is σ = 14096531232. Its totient is φ = 11744444400.

The previous prime is 12920354537. The next prime is 12920354593. The reversal of 12920354557 is 75545302921.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12920354557 - 2²⁷ = 12786136829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12920354537) 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 in 7 ways as a sum of consecutive naturals, for example, 42523 + ... + 166279.

It is an arithmetic number, because the mean of its divisors is an integer number (1762066404).

Almost surely, 2^12920354557 is an apocalyptic number.

It is an amenable number.

12920354557 is a deficient number, since it is larger than the sum of its proper divisors (1176176675).

12920354557 is a wasteful number, since it uses less digits than its factorization.

12920354557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133259.

The product of its (nonzero) digits is 378000, while the sum is 43.

The spelling of 12920354557 in words is "twelve billion, nine hundred twenty million, three hundred fifty-four thousand, five hundred fifty-seven".