21700354 has 8 divisors (see below), whose sum is σ = 35054460. Its totient is φ = 10015536.

The previous prime is 21700351. The next prime is 21700379. The reversal of 21700354 is 45300712.

It can be written as a sum of positive squares in 2 ways, for example, as 21669025 + 31329 = 4655^2 + 177^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21700351) 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 in 3 ways as a sum of consecutive naturals, for example, 417289 + ... + 417340.

Almost surely, 2^21700354 is an apocalyptic number.

21700354 is a deficient number, since it is larger than the sum of its proper divisors (13354106).

21700354 is a wasteful number, since it uses less digits than its factorization.

21700354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834644.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 21700354 is about 4658.3638758689. The cubic root of 21700354 is about 278.9259619493.

The spelling of 21700354 in words is "twenty-one million, seven hundred thousand, three hundred fifty-four".