20995526 has 16 divisors (see below), whose sum is σ = 32876928. Its totient is φ = 10046400.

The previous prime is 20995517. The next prime is 20995537. The reversal of 20995526 is 62559902.

It is a super-2 number, since 2×20995526² = 881624224033352, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20995526.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1931 + ... + 6761.

It is an arithmetic number, because the mean of its divisors is an integer number (2054808).

Almost surely, 2^20995526 is an apocalyptic number.

20995526 is a deficient number, since it is larger than the sum of its proper divisors (11881402).

20995526 is a wasteful number, since it uses less digits than its factorization.

20995526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4927.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 20995526 is about 4582.0875155326. The cubic root of 20995526 is about 275.8728235057.

The spelling of 20995526 in words is "twenty million, nine hundred ninety-five thousand, five hundred twenty-six".