26421320 has 32 divisors (see below), whose sum is σ = 61500600. Its totient is φ = 10203648.

The previous prime is 26421299. The next prime is 26421337. The reversal of 26421320 is 2312462.

It can be written as a sum of positive squares in 4 ways, for example, as 25180324 + 1240996 = 5018^2 + 1114^2 .

It is a super-3 number, since 3×26421320³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 26421292 and 26421301.

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, 10229 + ... + 12548.

Almost surely, 2^26421320 is an apocalyptic number.

26421320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26421320 is an abundant number, since it is smaller than the sum of its proper divisors (35079280).

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

26421320 is a wasteful number, since it uses less digits than its factorization.

26421320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22817 (or 22813 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 26421320 is about 5140.1673124520. The cubic root of 26421320 is about 297.8412439082.

Adding to 26421320 its reverse (2312462), we get a palindrome (28733782).

The spelling of 26421320 in words is "twenty-six million, four hundred twenty-one thousand, three hundred twenty".