11720858947 has 24 divisors (see below), whose sum is σ = 15196332240. Its totient is φ = 8957813760.

The previous prime is 11720858917. The next prime is 11720858951. The reversal of 11720858947 is 74985802711.

It is not a de Polignac number, because 11720858947 - 2⁷ = 11720858819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11720858894 and 11720858903.

It is not an unprimeable number, because it can be changed into a prime (11720858917) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 354454 + ... + 386107.

It is an arithmetic number, because the mean of its divisors is an integer number (633180510).

Almost surely, 2^11720858947 is an apocalyptic number.

11720858947 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

11720858947 is a deficient number, since it is larger than the sum of its proper divisors (3475473293).

11720858947 is a wasteful number, since it uses less digits than its factorization.

11720858947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740611 (or 740604 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 52.

The spelling of 11720858947 in words is "eleven billion, seven hundred twenty million, eight hundred fifty-eight thousand, nine hundred forty-seven".