21067496 has 8 divisors (see below), whose sum is σ = 39501570. Its totient is φ = 10533744.

The previous prime is 21067493. The next prime is 21067499. The reversal of 21067496 is 69476012.

It is an interprime number because it is at equal distance from previous prime (21067493) and next prime (21067499).

It can be written as a sum of positive squares in only one way, i.e., 21031396 + 36100 = 4586^2 + 190^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (21067493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1316711 + ... + 1316726.

Almost surely, 2^21067496 is an apocalyptic number.

It is an amenable number.

21067496 is a deficient number, since it is larger than the sum of its proper divisors (18434074).

21067496 is a wasteful number, since it uses less digits than its factorization.

21067496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633443 (or 2633439 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 21067496 is about 4589.9342043215. The cubic root of 21067496 is about 276.1876830286.

The spelling of 21067496 in words is "twenty-one million, sixty-seven thousand, four hundred ninety-six".