22070621 has 4 divisors (see below), whose sum is σ = 22289244. Its totient is φ = 21852000.

The previous prime is 22070603. The next prime is 22070627. The reversal of 22070621 is 12607022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9211225 + 12859396 = 3035^2 + 3586^2 .

It is a cyclic number.

It is not a de Polignac number, because 22070621 - 2⁶ = 22070557 is a prime.

It is a super-2 number, since 2×22070621² = 974224622651282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22070593 and 22070602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22070627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109160 + ... + 109361.

It is an arithmetic number, because the mean of its divisors is an integer number (5572311).

Almost surely, 2^22070621 is an apocalyptic number.

It is an amenable number.

22070621 is a deficient number, since it is larger than the sum of its proper divisors (218623).

22070621 is a wasteful number, since it uses less digits than its factorization.

22070621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218622.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 22070621 is about 4697.9379519104. The cubic root of 22070621 is about 280.5034352758.

Adding to 22070621 its reverse (12607022), we get a palindrome (34677643).

The spelling of 22070621 in words is "twenty-two million, seventy thousand, six hundred twenty-one".