11020506731 has 12 divisors (see below), whose sum is σ = 11949731640. Its totient is φ = 10158894720.

The previous prime is 11020506713. The next prime is 11020506767. The reversal of 11020506731 is 13760502011.

It is a de Polignac number, because none of the positive numbers 2^k-11020506731 is a prime.

It is a super-2 number, since 2×11020506731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11020506731.

It is not an unprimeable number, because it can be changed into a prime (11020500731) 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 11 ways as a sum of consecutive naturals, for example, 80771 + ... + 169011.

It is an arithmetic number, because the mean of its divisors is an integer number (995810970).

Almost surely, 2^11020506731 is an apocalyptic number.

11020506731 is a deficient number, since it is larger than the sum of its proper divisors (929224909).

11020506731 is an equidigital number, since it uses as much as digits as its factorization.

11020506731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89006 (or 88993 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The spelling of 11020506731 in words is "eleven billion, twenty million, five hundred six thousand, seven hundred thirty-one".