21214054 has 8 divisors (see below), whose sum is σ = 31844088. Its totient is φ = 10599360.

The previous prime is 21214049. The next prime is 21214087. The reversal of 21214054 is 45041212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21214054² = 900072174229832, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 694 + ... + 6550.

It is an arithmetic number, because the mean of its divisors is an integer number (3980511).

Almost surely, 2^21214054 is an apocalyptic number.

21214054 is a deficient number, since it is larger than the sum of its proper divisors (10630034).

21214054 is a wasteful number, since it uses less digits than its factorization.

21214054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7670.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 21214054 is about 4605.8716873139. The cubic root of 21214054 is about 276.8266454324.

Adding to 21214054 its reverse (45041212), we get a palindrome (66255266).

The spelling of 21214054 in words is "twenty-one million, two hundred fourteen thousand, fifty-four".