21653054 has 8 divisors (see below), whose sum is σ = 32521608. Its totient is φ = 10812520.

The previous prime is 21653039. The next prime is 21653057. The reversal of 21653054 is 45035612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21653057) by changing a digit.

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, 4952 + ... + 8235.

It is an arithmetic number, because the mean of its divisors is an integer number (4065201).

Almost surely, 2^21653054 is an apocalyptic number.

21653054 is a deficient number, since it is larger than the sum of its proper divisors (10868554).

21653054 is a wasteful number, since it uses less digits than its factorization.

21653054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14010.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 21653054 is about 4653.2842165507. The cubic root of 21653054 is about 278.7231573420.

Adding to 21653054 its reverse (45035612), we get a palindrome (66688666).

The spelling of 21653054 in words is "twenty-one million, six hundred fifty-three thousand, fifty-four".