12920542789 has 16 divisors (see below), whose sum is σ = 16265134080. Its totient is φ = 9970202160.

The previous prime is 12920542787. The next prime is 12920542837. The reversal of 12920542789 is 98724502921.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12920542789 - 2¹ = 12920542787 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 (12920542781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 806629 + ... + 822490.

It is an arithmetic number, because the mean of its divisors is an integer number (1016570880).

Almost surely, 2^12920542789 is an apocalyptic number.

It is an amenable number.

12920542789 is a deficient number, since it is larger than the sum of its proper divisors (3344591291).

12920542789 is a wasteful number, since it uses less digits than its factorization.

12920542789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629240.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 12920542789 in words is "twelve billion, nine hundred twenty million, five hundred forty-two thousand, seven hundred eighty-nine".