21043054 has 8 divisors (see below), whose sum is σ = 31805928. Its totient is φ = 10441080.

The previous prime is 21043037. The next prime is 21043069. The reversal of 21043054 is 45034012.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39897 + ... + 40420.

It is an arithmetic number, because the mean of its divisors is an integer number (3975741).

Almost surely, 2^21043054 is an apocalyptic number.

21043054 is a deficient number, since it is larger than the sum of its proper divisors (10762874).

21043054 is a wasteful number, since it uses less digits than its factorization.

21043054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80450.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 21043054 is about 4587.2708662123. The cubic root of 21043054 is about 276.0808329367.

Adding to 21043054 its reverse (45034012), we get a palindrome (66077066).

It can be divided in two parts, 210 and 43054, that added together give a square (43264 = 208²).

The spelling of 21043054 in words is "twenty-one million, forty-three thousand, fifty-four".