11420021365 has 16 divisors (see below), whose sum is σ = 13936183920. Its totient is φ = 8981406720.

The previous prime is 11420021351. The next prime is 11420021429. The reversal of 11420021365 is 56312002411.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5532681924 + 5887339441 = 74382^2 + 76729^2 .

It is not a de Polignac number, because 11420021365 - 2⁷ = 11420021237 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 621997 + ... + 640093.

It is an arithmetic number, because the mean of its divisors is an integer number (871011495).

Almost surely, 2^11420021365 is an apocalyptic number.

It is an amenable number.

11420021365 is a deficient number, since it is larger than the sum of its proper divisors (2516162555).

11420021365 is a wasteful number, since it uses less digits than its factorization.

11420021365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20232.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 11420021365 its reverse (56312002411), we get a palindrome (67732023776).

The spelling of 11420021365 in words is "eleven billion, four hundred twenty million, twenty-one thousand, three hundred sixty-five".