20995532 has 12 divisors (see below), whose sum is σ = 38676120. Its totient is φ = 9945216.

The previous prime is 20995517. The next prime is 20995537. The reversal of 20995532 is 23559902.

It is a junction number, because it is equal to n+sod(n) for n = 20995492 and 20995501.

It is not an unprimeable number, because it can be changed into a prime (20995537) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 138053 + ... + 138204.

It is an arithmetic number, because the mean of its divisors is an integer number (3223010).

Almost surely, 2^20995532 is an apocalyptic number.

It is an amenable number.

20995532 is a deficient number, since it is larger than the sum of its proper divisors (17680588).

20995532 is a wasteful number, since it uses less digits than its factorization.

20995532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276280 (or 276278 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 20995532 is about 4582.0881702560. The cubic root of 20995532 is about 275.8728497849.

The spelling of 20995532 in words is "twenty million, nine hundred ninety-five thousand, five hundred thirty-two".