21514669 has 16 divisors (see below), whose sum is σ = 24860160. Its totient is φ = 18414000.

The previous prime is 21514667. The next prime is 21514687. The reversal of 21514669 is 96641512.

It is not a de Polignac number, because 21514669 - 2¹ = 21514667 is a prime.

It is a super-2 number, since 2×21514669² = 925761964359122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514667) 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 15 ways as a sum of consecutive naturals, for example, 64834 + ... + 65164.

It is an arithmetic number, because the mean of its divisors is an integer number (1553760).

Almost surely, 2^21514669 is an apocalyptic number.

It is an amenable number.

21514669 is a deficient number, since it is larger than the sum of its proper divisors (3345491).

21514669 is a wasteful number, since it uses less digits than its factorization.

21514669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672.

The product of its digits is 12960, while the sum is 34.

The square root of 21514669 is about 4638.3907769829. The cubic root of 21514669 is about 278.1281132337.

It can be divided in two parts, 215 and 14669, that added together give a square (14884 = 122²).

The spelling of 21514669 in words is "twenty-one million, five hundred fourteen thousand, six hundred sixty-nine".