11620021 has 8 divisors (see below), whose sum is σ = 13314944. Its totient is φ = 9933840.

The previous prime is 11620013. The next prime is 11620033. The reversal of 11620021 is 12002611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11620021 - 2³ = 11620013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11619983 and 11620010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11620051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 976 + ... + 4918.

It is an arithmetic number, because the mean of its divisors is an integer number (1664368).

Almost surely, 2^11620021 is an apocalyptic number.

It is an amenable number.

11620021 is a deficient number, since it is larger than the sum of its proper divisors (1694923).

11620021 is an equidigital number, since it uses as much as digits as its factorization.

11620021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4371.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 11620021 is about 3408.8151900624. The cubic root of 11620021 is about 226.5003987797.

Adding to 11620021 its reverse (12002611), we get a palindrome (23622632).

The spelling of 11620021 in words is "eleven million, six hundred twenty thousand, twenty-one".