20421622 has 24 divisors (see below), whose sum is σ = 34257600. Its totient is φ = 9116640.

The previous prime is 20421593. The next prime is 20421629. The reversal of 20421622 is 22612402.

It is a super-2 number, since 2×20421622² = 834085290221768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20421622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20421629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9504 + ... + 11452.

It is an arithmetic number, because the mean of its divisors is an integer number (1427400).

Almost surely, 2^20421622 is an apocalyptic number.

20421622 is a deficient number, since it is larger than the sum of its proper divisors (13835978).

20421622 is a wasteful number, since it uses less digits than its factorization.

20421622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008 (or 1995 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20421622 is about 4519.0288779781. The cubic root of 20421622 is about 273.3359431967.

The spelling of 20421622 in words is "twenty million, four hundred twenty-one thousand, six hundred twenty-two".