22420521 has 12 divisors (see below), whose sum is σ = 32438640. Its totient is φ = 14922360.

The previous prime is 22420507. The next prime is 22420523. The reversal of 22420521 is 12502422.

It is not a de Polignac number, because 22420521 - 2¹³ = 22412329 is a prime.

It is a super-2 number, since 2×22420521² = 1005359523822882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22420494 and 22420503.

It is not an unprimeable number, because it can be changed into a prime (22420523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4966 + ... + 8336.

It is an arithmetic number, because the mean of its divisors is an integer number (2703220).

Almost surely, 2^22420521 is an apocalyptic number.

It is an amenable number.

22420521 is a deficient number, since it is larger than the sum of its proper divisors (10018119).

22420521 is a wasteful number, since it uses less digits than its factorization.

22420521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4116 (or 4113 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22420521 is about 4735.0312564966. The cubic root of 22420521 is about 281.9780049240.

Adding to 22420521 its reverse (12502422), we get a palindrome (34922943).

The spelling of 22420521 in words is "twenty-two million, four hundred twenty thousand, five hundred twenty-one".