22071813 has 16 divisors (see below), whose sum is σ = 30950400. Its totient is φ = 13970880.

The previous prime is 22071809. The next prime is 22071839. The reversal of 22071813 is 31817022.

It is not a de Polignac number, because 22071813 - 2² = 22071809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22071883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3228 + ... + 7386.

It is an arithmetic number, because the mean of its divisors is an integer number (1934400).

Almost surely, 2^22071813 is an apocalyptic number.

It is an amenable number.

22071813 is a deficient number, since it is larger than the sum of its proper divisors (8878587).

22071813 is a wasteful number, since it uses less digits than its factorization.

22071813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 22071813 is about 4698.0648143677. The cubic root of 22071813 is about 280.5084850367.

Adding to 22071813 its reverse (31817022), we get a palindrome (53888835).

The spelling of 22071813 in words is "twenty-two million, seventy-one thousand, eight hundred thirteen".