21710954 has 4 divisors (see below), whose sum is σ = 32566434. Its totient is φ = 10855476.

The previous prime is 21710951. The next prime is 21710957. The reversal of 21710954 is 45901712.

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

It is an interprime number because it is at equal distance from previous prime (21710951) and next prime (21710957).

It can be written as a sum of positive squares in only one way, i.e., 11323225 + 10387729 = 3365^2 + 3223^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21710951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5427737 + ... + 5427740.

Almost surely, 2^21710954 is an apocalyptic number.

21710954 is a deficient number, since it is larger than the sum of its proper divisors (10855480).

21710954 is a wasteful number, since it uses less digits than its factorization.

21710954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10855479.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 21710954 is about 4659.5014754800. The cubic root of 21710954 is about 278.9713703317.

The spelling of 21710954 in words is "twenty-one million, seven hundred ten thousand, nine hundred fifty-four".