20735022 has 64 divisors (see below), whose sum is σ = 53144064. Its totient is φ = 5235840.

The previous prime is 20735009. The next prime is 20735027. The reversal of 20735022 is 22053702.

It is a super-2 number, since 2×20735022² = 859882274680968, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20735022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20735027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16488 + ... + 17700.

It is an arithmetic number, because the mean of its divisors is an integer number (830376).

Almost surely, 2^20735022 is an apocalyptic number.

20735022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20735022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26572032).

20735022 is an abundant number, since it is smaller than the sum of its proper divisors (32409042).

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

20735022 is a wasteful number, since it uses less digits than its factorization.

20735022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 20735022 is about 4553.5724436974. The cubic root of 20735022 is about 274.7270989685.

Adding to 20735022 its reverse (22053702), we get a palindrome (42788724).

The spelling of 20735022 in words is "twenty million, seven hundred thirty-five thousand, twenty-two".