20814426 has 48 divisors (see below), whose sum is σ = 48117888. Its totient is φ = 6480000.

The previous prime is 20814403. The next prime is 20814439. The reversal of 20814426 is 62441802.

It is a self number, because there is not a number n which added to its sum of digits gives 20814426.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76671 + ... + 76941.

It is an arithmetic number, because the mean of its divisors is an integer number (1002456).

Almost surely, 2^20814426 is an apocalyptic number.

20814426 is the 2439-th nonagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20814426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24058944).

20814426 is an abundant number, since it is smaller than the sum of its proper divisors (27303462).

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

20814426 is a wasteful number, since it uses less digits than its factorization.

20814426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 20814426 is about 4562.2829811400. The cubic root of 20814426 is about 275.0773380279.

The spelling of 20814426 in words is "twenty million, eight hundred fourteen thousand, four hundred twenty-six".