20995078 has 16 divisors (see below), whose sum is σ = 34095600. Its totient is φ = 9638496.

The previous prime is 20995069. The next prime is 20995087. The reversal of 20995078 is 87059902.

It is an interprime number because it is at equal distance from previous prime (20995069) and next prime (20995087).

It is a self number, because there is not a number n which added to its sum of digits gives 20995078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3073 + ... + 7171.

It is an arithmetic number, because the mean of its divisors is an integer number (2130975).

Almost surely, 2^20995078 is an apocalyptic number.

20995078 is a deficient number, since it is larger than the sum of its proper divisors (13100522).

20995078 is a wasteful number, since it uses less digits than its factorization.

20995078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4311.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 20995078 is about 4582.0386292566. The cubic root of 20995078 is about 275.8708613114.

The spelling of 20995078 in words is "twenty million, nine hundred ninety-five thousand, seventy-eight".