20495849 has 8 divisors (see below), whose sum is σ = 22424448. Its totient is φ = 18578160.

The previous prime is 20495843. The next prime is 20495861. The reversal of 20495849 is 94859402.

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

It is a cyclic number.

It is not a de Polignac number, because 20495849 - 2¹² = 20491753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20495843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1499 + ... + 6575.

It is an arithmetic number, because the mean of its divisors is an integer number (2803056).

Almost surely, 2^20495849 is an apocalyptic number.

It is an amenable number.

20495849 is a deficient number, since it is larger than the sum of its proper divisors (1928599).

20495849 is a wasteful number, since it uses less digits than its factorization.

20495849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5455.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 20495849 is about 4527.2341445965. The cubic root of 20495849 is about 273.6667098556. Note that the first 3 decimals are identical.

The spelling of 20495849 in words is "twenty million, four hundred ninety-five thousand, eight hundred forty-nine".