21026054 has 32 divisors (see below), whose sum is σ = 37635840. Its totient is φ = 8622432.

The previous prime is 21026053. The next prime is 21026063. The reversal of 21026054 is 45062012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21026053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31577 + ... + 32235.

It is an arithmetic number, because the mean of its divisors is an integer number (1176120).

Almost surely, 2^21026054 is an apocalyptic number.

21026054 is a deficient number, since it is larger than the sum of its proper divisors (16609786).

21026054 is a wasteful number, since it uses less digits than its factorization.

21026054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 21026054 is about 4585.4175382401. The cubic root of 21026054 is about 276.0064673273.

Adding to 21026054 its reverse (45062012), we get a palindrome (66088066).

The spelling of 21026054 in words is "twenty-one million, twenty-six thousand, fifty-four".