20195049 has 16 divisors (see below), whose sum is σ = 31835520. Its totient is φ = 11141760.

The previous prime is 20195047. The next prime is 20195057. The reversal of 20195049 is 94059102.

It is a happy number.

It is not a de Polignac number, because 20195049 - 2¹ = 20195047 is a prime.

It is a super-2 number, since 2×20195049² = 815680008224802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20195047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15972 + ... + 17189.

It is an arithmetic number, because the mean of its divisors is an integer number (1989720).

Almost surely, 2^20195049 is an apocalyptic number.

20195049 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20195049 is a deficient number, since it is larger than the sum of its proper divisors (11640471).

20195049 is a wasteful number, since it uses less digits than its factorization.

20195049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33200.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 20195049 is about 4493.8901855742. The cubic root of 20195049 is about 272.3213159592.

The spelling of 20195049 in words is "twenty million, one hundred ninety-five thousand, forty-nine".