20229426 has 40 divisors (see below), whose sum is σ = 51807360. Its totient is φ = 5779512.

The previous prime is 20229421. The next prime is 20229427. The reversal of 20229426 is 62492202.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20229426.

It is not an unprimeable number, because it can be changed into a prime (20229421) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7786 + ... + 10053.

It is an arithmetic number, because the mean of its divisors is an integer number (1295184).

Almost surely, 2^20229426 is an apocalyptic number.

20229426 is an abundant number, since it is smaller than the sum of its proper divisors (31577934).

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

20229426 is a wasteful number, since it uses less digits than its factorization.

20229426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17860 (or 17851 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20229426 is about 4497.7134190608. The cubic root of 20229426 is about 272.4757479188.

The spelling of 20229426 in words is "twenty million, two hundred twenty-nine thousand, four hundred twenty-six".