21193010 has 8 divisors (see below), whose sum is σ = 38147436. Its totient is φ = 8477200.

The previous prime is 21192989. The next prime is 21193043. The reversal of 21193010 is 1039112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19918369 + 1274641 = 4463^2 + 1129^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21193010.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1059641 + ... + 1059660.

Almost surely, 2^21193010 is an apocalyptic number.

21193010 is a deficient number, since it is larger than the sum of its proper divisors (16954426).

21193010 is a wasteful number, since it uses less digits than its factorization.

21193010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119308.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 21193010 is about 4603.5866452148. The cubic root of 21193010 is about 276.7350792900.

It can be divided in two parts, 2 and 1193010, that multiplied together give a triangular number (2386020 = T₂₁₈₄).

The spelling of 21193010 in words is "twenty-one million, one hundred ninety-three thousand, ten".