21050529 has 8 divisors (see below), whose sum is σ = 28486560. Its totient is φ = 13824096.

The previous prime is 21050527. The next prime is 21050567. The reversal of 21050529 is 92505012.

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

It is not a de Polignac number, because 21050529 - 2¹ = 21050527 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21050499 and 21050508.

It is not an unprimeable number, because it can be changed into a prime (21050527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52164 + ... + 52565.

It is an arithmetic number, because the mean of its divisors is an integer number (3560820).

Almost surely, 2^21050529 is an apocalyptic number.

It is an amenable number.

21050529 is a deficient number, since it is larger than the sum of its proper divisors (7436031).

21050529 is a wasteful number, since it uses less digits than its factorization.

21050529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104799.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 21050529 is about 4588.0855484614. The cubic root of 21050529 is about 276.1135192555.

The spelling of 21050529 in words is "twenty-one million, fifty thousand, five hundred twenty-nine".