20522208 has 48 divisors (see below), whose sum is σ = 61568640. Its totient is φ = 5863296.

The previous prime is 20522207. The next prime is 20522209. The reversal of 20522208 is 80222502.

It is an interprime number because it is at equal distance from previous prime (20522207) and next prime (20522209).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×20522208² = 842322042390528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20522207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14598 + ... + 15941.

It is an arithmetic number, because the mean of its divisors is an integer number (1282680).

Almost surely, 2^20522208 is an apocalyptic number.

20522208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20522208 is an abundant number, since it is smaller than the sum of its proper divisors (41046432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20522208 is a wasteful number, since it uses less digits than its factorization.

20522208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30559 (or 30551 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 20522208 is about 4530.1443685605. The cubic root of 20522208 is about 273.7839773510.

The spelling of 20522208 in words is "twenty million, five hundred twenty-two thousand, two hundred eight".