20848949 has 4 divisors (see below), whose sum is σ = 22744320. Its totient is φ = 18953580.

The previous prime is 20848943. The next prime is 20848963. The reversal of 20848949 is 94984802.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20848949 - 2⁸ = 20848693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20848943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947669 + ... + 947690.

It is an arithmetic number, because the mean of its divisors is an integer number (5686080).

Almost surely, 2^20848949 is an apocalyptic number.

It is an amenable number.

20848949 is a deficient number, since it is larger than the sum of its proper divisors (1895371).

20848949 is a wasteful number, since it uses less digits than its factorization.

20848949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895370.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 20848949 is about 4566.0649360253. The cubic root of 20848949 is about 275.2293359651.

The spelling of 20848949 in words is "twenty million, eight hundred forty-eight thousand, nine hundred forty-nine".