21736054 has 4 divisors (see below), whose sum is σ = 32604084. Its totient is φ = 10868026.

The previous prime is 21736037. The next prime is 21736067. The reversal of 21736054 is 45063712.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5434012 + ... + 5434015.

It is an arithmetic number, because the mean of its divisors is an integer number (8151021).

Almost surely, 2^21736054 is an apocalyptic number.

21736054 is a deficient number, since it is larger than the sum of its proper divisors (10868030).

21736054 is a wasteful number, since it uses less digits than its factorization.

21736054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10868029.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 21736054 is about 4662.1941186527. The cubic root of 21736054 is about 279.0788350509.

Adding to 21736054 its reverse (45063712), we get a palindrome (66799766).

The spelling of 21736054 in words is "twenty-one million, seven hundred thirty-six thousand, fifty-four".