21073095 has 32 divisors (see below), whose sum is σ = 37766400. Its totient is φ = 11148192.

The previous prime is 21073093. The next prime is 21073097. The reversal of 21073095 is 59037012.

It is an interprime number because it is at equal distance from previous prime (21073093) and next prime (21073097).

It is not a de Polignac number, because 21073095 - 2¹ = 21073093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21073093) 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, 18204 + ... + 19326.

It is an arithmetic number, because the mean of its divisors is an integer number (1180200).

Almost surely, 2^21073095 is an apocalyptic number.

21073095 is a deficient number, since it is larger than the sum of its proper divisors (16693305).

21073095 is a wasteful number, since it uses less digits than its factorization.

21073095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276 (or 1270 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 21073095 is about 4590.5440853999. The cubic root of 21073095 is about 276.2121478545.

The spelling of 21073095 in words is "twenty-one million, seventy-three thousand, ninety-five".