21735046 has 16 divisors (see below), whose sum is σ = 34408800. Its totient is φ = 10276288.

The previous prime is 21735037. The next prime is 21735053. The reversal of 21735046 is 64053712.

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, 1440 + ... + 6748.

It is an arithmetic number, because the mean of its divisors is an integer number (2150550).

Almost surely, 2^21735046 is an apocalyptic number.

21735046 is a deficient number, since it is larger than the sum of its proper divisors (12673754).

21735046 is a wasteful number, since it uses less digits than its factorization.

21735046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5423.

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

The square root of 21735046 is about 4662.0860137925. The cubic root of 21735046 is about 279.0745209312.

Adding to 21735046 its reverse (64053712), we get a palindrome (85788758).

The spelling of 21735046 in words is "twenty-one million, seven hundred thirty-five thousand, forty-six".