21552014 has 16 divisors (see below), whose sum is σ = 35392896. Its totient is φ = 9761400.

The previous prime is 21552007. The next prime is 21552031. The reversal of 21552014 is 41025512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5159 + ... + 8349.

It is an arithmetic number, because the mean of its divisors is an integer number (2212056).

Almost surely, 2^21552014 is an apocalyptic number.

21552014 is a deficient number, since it is larger than the sum of its proper divisors (13840882).

21552014 is a wasteful number, since it uses less digits than its factorization.

21552014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 21552014 is about 4642.4146734216. The cubic root of 21552014 is about 278.2889444393.

Adding to 21552014 its reverse (41025512), we get a palindrome (62577526).

The spelling of 21552014 in words is "twenty-one million, five hundred fifty-two thousand, fourteen".