21514086 has 40 divisors (see below), whose sum is σ = 52594344. Its totient is φ = 6518880.

The previous prime is 21514081. The next prime is 21514091. The reversal of 21514086 is 68041512.

It is an interprime number because it is at equal distance from previous prime (21514081) and next prime (21514091).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4255 + ... + 7818.

Almost surely, 2^21514086 is an apocalyptic number.

21514086 is an abundant number, since it is smaller than the sum of its proper divisors (31080258).

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

21514086 is a wasteful number, since it uses less digits than its factorization.

21514086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12098 (or 12089 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 21514086 is about 4638.3279314857. The cubic root of 21514086 is about 278.1256009918.

Adding to 21514086 its reverse (68041512), we get a palindrome (89555598).

The spelling of 21514086 in words is "twenty-one million, five hundred fourteen thousand, eighty-six".