20279296 has 26 divisors (see below), whose sum is σ = 40561832. Its totient is φ = 10137600.

The previous prime is 20279291. The next prime is 20279309. The reversal of 20279296 is 69297202.

It is a super-2 number, since 2×20279296² = 822499692511232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20279291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1621 + ... + 6571.

Almost surely, 2^20279296 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20279296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20280916).

20279296 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20279296 is an frugal number, since it uses more digits than its factorization.

20279296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4975 (or 4953 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 20279296 is about 4503.2539346566. The cubic root of 20279296 is about 272.6994684651.

The spelling of 20279296 in words is "twenty million, two hundred seventy-nine thousand, two hundred ninety-six".