20949508 has 12 divisors (see below), whose sum is σ = 38818332. Its totient is φ = 9858560.

The previous prime is 20949499. The next prime is 20949529. The reversal of 20949508 is 80594902.

It can be written as a sum of positive squares in 2 ways, for example, as 12376324 + 8573184 = 3518^2 + 2928^2 .

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153973 + ... + 154108.

It is an arithmetic number, because the mean of its divisors is an integer number (3234861).

Almost surely, 2^20949508 is an apocalyptic number.

It is an amenable number.

20949508 is a deficient number, since it is larger than the sum of its proper divisors (17868824).

20949508 is a wasteful number, since it uses less digits than its factorization.

20949508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308102 (or 308100 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 20949508 is about 4577.0632506008. The cubic root of 20949508 is about 275.6711233600.

The spelling of 20949508 in words is "twenty million, nine hundred forty-nine thousand, five hundred eight".