21472514 has 16 divisors (see below), whose sum is σ = 37594368. Its totient is φ = 9006432.

The previous prime is 21472483. The next prime is 21472531. The reversal of 21472514 is 41527412.

It is a super-2 number, since 2×21472514² = 922137714960392, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 11.

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, 15659 + ... + 16974.

It is an arithmetic number, because the mean of its divisors is an integer number (2349648).

Almost surely, 2^21472514 is an apocalyptic number.

21472514 is a deficient number, since it is larger than the sum of its proper divisors (16121854).

21472514 is a wasteful number, since it uses less digits than its factorization.

21472514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32689.

The product of its digits is 2240, while the sum is 26.

The square root of 21472514 is about 4633.8444082640. The cubic root of 21472514 is about 277.9463433528.

Adding to 21472514 its reverse (41527412), we get a palindrome (62999926).

The spelling of 21472514 in words is "twenty-one million, four hundred seventy-two thousand, five hundred fourteen".