126920380803 has 4 divisors (see below), whose sum is σ = 169227174408. Its totient is φ = 84613587200.

The previous prime is 126920380789. The next prime is 126920380877. The reversal of 126920380803 is 308083029621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 308083029621 = 3 ⋅102694343207.

It is a cyclic number.

It is not a de Polignac number, because 126920380803 - 2⁶ = 126920380739 is a prime.

It is a super-2 number, since 2×126920380803² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126920380303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21153396798 + ... + 21153396803.

It is an arithmetic number, because the mean of its divisors is an integer number (42306793602).

Almost surely, 2^126920380803 is an apocalyptic number.

126920380803 is a deficient number, since it is larger than the sum of its proper divisors (42306793605).

126920380803 is an equidigital number, since it uses as much as digits as its factorization.

126920380803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42306793604.

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 126920380803 in words is "one hundred twenty-six billion, nine hundred twenty million, three hundred eighty thousand, eight hundred three".