20622812 has 48 divisors (see below), whose sum is σ = 44470272. Its totient is φ = 8173440.

The previous prime is 20622803. The next prime is 20622821. The reversal of 20622812 is 21822602.

It is an interprime number because it is at equal distance from previous prime (20622803) and next prime (20622821).

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19448 + ... + 20480.

It is an arithmetic number, because the mean of its divisors is an integer number (926464).

Almost surely, 2^20622812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20622812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22235136).

20622812 is an abundant number, since it is smaller than the sum of its proper divisors (23847460).

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

20622812 is a wasteful number, since it uses less digits than its factorization.

20622812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098 (or 1096 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 20622812 is about 4541.2346338854. The cubic root of 20622812 is about 274.2306296975.

The spelling of 20622812 in words is "twenty million, six hundred twenty-two thousand, eight hundred twelve".