20995512 has 16 divisors (see below), whose sum is σ = 52488840. Its totient is φ = 6998496.

The previous prime is 20995489. The next prime is 20995517. The reversal of 20995512 is 21559902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20995517) 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, 437383 + ... + 437430.

Almost surely, 2^20995512 is an apocalyptic number.

It is an amenable number.

20995512 is an abundant number, since it is smaller than the sum of its proper divisors (31493328).

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

20995512 is a wasteful number, since it uses less digits than its factorization.

20995512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874822 (or 874818 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 20995512 is about 4582.0859878444. The cubic root of 20995512 is about 275.8727621875.

The spelling of 20995512 in words is "twenty million, nine hundred ninety-five thousand, five hundred twelve".