21070495 has 8 divisors (see below), whose sum is σ = 25662384. Its totient is φ = 16604544.

The previous prime is 21070481. The next prime is 21070513. The reversal of 21070495 is 59407012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21070495 - 2¹⁵ = 21037727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 31114 + ... + 31783.

It is an arithmetic number, because the mean of its divisors is an integer number (3207798).

Almost surely, 2^21070495 is an apocalyptic number.

21070495 is a deficient number, since it is larger than the sum of its proper divisors (4591889).

21070495 is an equidigital number, since it uses as much as digits as its factorization.

21070495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62969.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 21070495 is about 4590.2608858321. The cubic root of 21070495 is about 276.2007876956.

The spelling of 21070495 in words is "twenty-one million, seventy thousand, four hundred ninety-five".