21363080 has 16 divisors (see below), whose sum is σ = 48067020. Its totient is φ = 8545216.

The previous prime is 21363079. The next prime is 21363103. The reversal of 21363080 is 8036312.

It can be written as a sum of positive squares in 2 ways, for example, as 21362884 + 196 = 4622^2 + 14^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266999 + ... + 267078.

Almost surely, 2^21363080 is an apocalyptic number.

21363080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21363080 is an abundant number, since it is smaller than the sum of its proper divisors (26703940).

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

21363080 is a wasteful number, since it uses less digits than its factorization.

21363080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534088 (or 534084 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 21363080 is about 4622.0212028938. The cubic root of 21363080 is about 277.4733572885.

Adding to 21363080 its reverse (8036312), we get a palindrome (29399392).

The spelling of 21363080 in words is "twenty-one million, three hundred sixty-three thousand, eighty".