20249995 has 8 divisors (see below), whose sum is σ = 24541200. Its totient is φ = 16039200.

The previous prime is 20249969. The next prime is 20250007. The reversal of 20249995 is 59994202.

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

It is not a de Polignac number, because 20249995 - 2⁵ = 20249963 is a prime.

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, 19545 + ... + 20554.

It is an arithmetic number, because the mean of its divisors is an integer number (3067650).

Almost surely, 2^20249995 is an apocalyptic number.

20249995 is a deficient number, since it is larger than the sum of its proper divisors (4291205).

20249995 is a wasteful number, since it uses less digits than its factorization.

20249995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40205.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 20249995 is about 4499.9994444444. Note that the first 3 decimals coincide. The cubic root of 20249995 is about 272.5680664912.

The spelling of 20249995 in words is "twenty million, two hundred forty-nine thousand, nine hundred ninety-five".