20849673 has 8 divisors (see below), whose sum is σ = 29938048. Its totient is φ = 12830544.

The previous prime is 20849659. The next prime is 20849677. The reversal of 20849673 is 37694802.

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

It is not a de Polignac number, because 20849673 - 2⁴ = 20849657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 534607 = 20849673 / (2 + 0 + 8 + 4 + 9 + 6 + 7 + 3).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20849677) 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, 267265 + ... + 267342.

It is an arithmetic number, because the mean of its divisors is an integer number (3742256).

Almost surely, 2^20849673 is an apocalyptic number.

It is an amenable number.

20849673 is a deficient number, since it is larger than the sum of its proper divisors (9088375).

20849673 is a wasteful number, since it uses less digits than its factorization.

20849673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534623.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 20849673 is about 4566.1442158565. The cubic root of 20849673 is about 275.2325217968.

The spelling of 20849673 in words is "twenty million, eight hundred forty-nine thousand, six hundred seventy-three".