20229966 has 32 divisors (see below), whose sum is σ = 47602080. Its totient is φ = 6346368.

The previous prime is 20229961. The next prime is 20229971. The reversal of 20229966 is 66992202.

It is an interprime number because it is at equal distance from previous prime (20229961) and next prime (20229971).

It is a super-2 number, since 2×20229966² = 818503048722312, 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 20229966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20229961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10101 + ... + 11936.

It is an arithmetic number, because the mean of its divisors is an integer number (1487565).

Almost surely, 2^20229966 is an apocalyptic number.

20229966 is an abundant number, since it is smaller than the sum of its proper divisors (27372114).

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

20229966 is a wasteful number, since it uses less digits than its factorization.

20229966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22065 (or 22059 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 20229966 is about 4497.7734491635. The cubic root of 20229966 is about 272.4781723672.

The spelling of 20229966 in words is "twenty million, two hundred twenty-nine thousand, nine hundred sixty-six".