20750022 has 48 divisors (see below), whose sum is σ = 47024640. Its totient is φ = 6604416.

The previous prime is 20750017. The next prime is 20750027. The reversal of 20750022 is 22005702.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20750017) and next prime (20750027).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20749977 and 20750004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20750027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66138 + ... + 66450.

It is an arithmetic number, because the mean of its divisors is an integer number (979680).

Almost surely, 2^20750022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20750022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23512320).

20750022 is an abundant number, since it is smaller than the sum of its proper divisors (26274618).

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

20750022 is a wasteful number, since it uses less digits than its factorization.

20750022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 20750022 is about 4555.2192043852. The cubic root of 20750022 is about 274.7933301204.

Adding to 20750022 its reverse (22005702), we get a palindrome (42755724).

The spelling of 20750022 in words is "twenty million, seven hundred fifty thousand, twenty-two".