20995495 has 8 divisors (see below), whose sum is σ = 25322400. Its totient is φ = 16711200.

The previous prime is 20995489. The next prime is 20995517. The reversal of 20995495 is 59459902.

It is a happy number.

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

It is not a de Polignac number, because 20995495 - 2¹¹ = 20993447 is a prime.

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, 9556 + ... + 11545.

It is an arithmetic number, because the mean of its divisors is an integer number (3165300).

Almost surely, 2^20995495 is an apocalyptic number.

20995495 is a deficient number, since it is larger than the sum of its proper divisors (4326905).

20995495 is a wasteful number, since it uses less digits than its factorization.

20995495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21305.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 20995495 is about 4582.0841327937. The cubic root of 20995495 is about 275.8726877297.

The spelling of 20995495 in words is "twenty million, nine hundred ninety-five thousand, four hundred ninety-five".