21070959 has 32 divisors (see below), whose sum is σ = 35051520. Its totient is φ = 10962432.

The previous prime is 21070949. The next prime is 21070969. The reversal of 21070959 is 95907012.

It is an interprime number because it is at equal distance from previous prime (21070949) and next prime (21070969).

It is not a de Polignac number, because 21070959 - 2⁷ = 21070831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21070909) 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 31 ways as a sum of consecutive naturals, for example, 21079 + ... + 22055.

It is an arithmetic number, because the mean of its divisors is an integer number (1095360).

Almost surely, 2^21070959 is an apocalyptic number.

21070959 is a deficient number, since it is larger than the sum of its proper divisors (13980561).

21070959 is a wasteful number, since it uses less digits than its factorization.

21070959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 21070959 is about 4590.3114273435. The cubic root of 21070959 is about 276.2028151156.

The spelling of 21070959 in words is "twenty-one million, seventy thousand, nine hundred fifty-nine".