21410534 has 4 divisors (see below), whose sum is σ = 32115804. Its totient is φ = 10705266.

The previous prime is 21410503. The next prime is 21410537. The reversal of 21410534 is 43501412.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21410537) 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 as a sum of consecutive naturals, namely, 5352632 + ... + 5352635.

It is an arithmetic number, because the mean of its divisors is an integer number (8028951).

Almost surely, 2^21410534 is an apocalyptic number.

21410534 is a deficient number, since it is larger than the sum of its proper divisors (10705270).

21410534 is a wasteful number, since it uses less digits than its factorization.

21410534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10705269.

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

The square root of 21410534 is about 4627.1518237464. The cubic root of 21410534 is about 277.6786566994.

Adding to 21410534 its reverse (43501412), we get a palindrome (64911946).

The spelling of 21410534 in words is "twenty-one million, four hundred ten thousand, five hundred thirty-four".