21054446 has 16 divisors (see below), whose sum is σ = 36306144. Its totient is φ = 8970144.

The previous prime is 21054437. The next prime is 21054457. The reversal of 21054446 is 64445012.

It is a congruent number.

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, 1925 + ... + 6768.

It is an arithmetic number, because the mean of its divisors is an integer number (2269134).

Almost surely, 2^21054446 is an apocalyptic number.

21054446 is a deficient number, since it is larger than the sum of its proper divisors (15251698).

21054446 is a wasteful number, since it uses less digits than its factorization.

21054446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8875.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 21054446 is about 4588.5123951015. The cubic root of 21054446 is about 276.1306442341.

Adding to 21054446 its reverse (64445012), we get a palindrome (85499458).

The spelling of 21054446 in words is "twenty-one million, fifty-four thousand, four hundred forty-six".