22970021 has 4 divisors (see below), whose sum is σ = 23002092. Its totient is φ = 22937952.

The previous prime is 22969997. The next prime is 22970027. The reversal of 22970021 is 12007922.

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 22221796 + 748225 = 4714^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 22970021 - 2⁶ = 22969957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22970027) 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, 14936 + ... + 16401.

It is an arithmetic number, because the mean of its divisors is an integer number (5750523).

Almost surely, 2^22970021 is an apocalyptic number.

It is an amenable number.

22970021 is a deficient number, since it is larger than the sum of its proper divisors (32071).

22970021 is an equidigital number, since it uses as much as digits as its factorization.

22970021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32070.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 22970021 is about 4792.7049773588. The cubic root of 22970021 is about 284.2630844242.

Adding to 22970021 its reverse (12007922), we get a palindrome (34977943).

The spelling of 22970021 in words is "twenty-two million, nine hundred seventy thousand, twenty-one".