20949748 has 12 divisors (see below), whose sum is σ = 36987300. Its totient is φ = 10381952.

The previous prime is 20949743. The next prime is 20949749. The reversal of 20949748 is 84794902.

It can be written as a sum of positive squares in 2 ways, for example, as 1695204 + 19254544 = 1302^2 + 4388^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20949743) 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, 22723 + ... + 23626.

It is an arithmetic number, because the mean of its divisors is an integer number (3082275).

Almost surely, 2^20949748 is an apocalyptic number.

It is an amenable number.

20949748 is a deficient number, since it is larger than the sum of its proper divisors (16037552).

20949748 is a wasteful number, since it uses less digits than its factorization.

20949748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46466 (or 46464 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 20949748 is about 4577.0894682101. The cubic root of 20949748 is about 275.6721760628.

The spelling of 20949748 in words is "twenty million, nine hundred forty-nine thousand, seven hundred forty-eight".