20723226 has 16 divisors (see below), whose sum is σ = 42876000. Its totient is φ = 6669488.

The previous prime is 20723173. The next prime is 20723231. The reversal of 20723226 is 62232702.

It is a junction number, because it is equal to n+sod(n) for n = 20723196 and 20723205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59376 + ... + 59723.

It is an arithmetic number, because the mean of its divisors is an integer number (2679750).

Almost surely, 2^20723226 is an apocalyptic number.

20723226 is an abundant number, since it is smaller than the sum of its proper divisors (22152774).

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

20723226 is a wasteful number, since it uses less digits than its factorization.

20723226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119133.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 20723226 is about 4552.2770126608. The cubic root of 20723226 is about 274.6749923509.

Adding to 20723226 its reverse (62232702), we get a palindrome (82955928).

The spelling of 20723226 in words is "twenty million, seven hundred twenty-three thousand, two hundred twenty-six".