21024594 has 24 divisors (see below), whose sum is σ = 47125260. Its totient is φ = 6766368.

The previous prime is 21024589. The next prime is 21024607. The reversal of 21024594 is 49542012.

It can be written as a sum of positive squares in 2 ways, for example, as 19474569 + 1550025 = 4413^2 + 1245^2 .

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 11 ways as a sum of consecutive naturals, for example, 19617 + ... + 20660.

Almost surely, 2^21024594 is an apocalyptic number.

21024594 is an abundant number, since it is smaller than the sum of its proper divisors (26100666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21024594 is a wasteful number, since it uses less digits than its factorization.

21024594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40314 (or 40311 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 21024594 is about 4585.2583351432. The cubic root of 21024594 is about 276.0000787649. Note that the first 4 decimals are identical.

It can be divided in two parts, 2 and 1024594, that added together give a triangular number (1024596 = T₁₄₃₁).

The spelling of 21024594 in words is "twenty-one million, twenty-four thousand, five hundred ninety-four".