20949331 has 8 divisors (see below), whose sum is σ = 22879584. Its totient is φ = 19064640.

The previous prime is 20949329. The next prime is 20949353. The reversal of 20949331 is 13394902.

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 20949331 - 2¹ = 20949329 is a prime.

It is a super-2 number, since 2×20949331² = 877748938695122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20949293 and 20949302.

It is not an unprimeable number, because it can be changed into a prime (20949301) 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, 10426 + ... + 12271.

It is an arithmetic number, because the mean of its divisors is an integer number (2859948).

Almost surely, 2^20949331 is an apocalyptic number.

20949331 is a deficient number, since it is larger than the sum of its proper divisors (1930253).

20949331 is a wasteful number, since it uses less digits than its factorization.

20949331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22781.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 20949331 is about 4577.0439150176. The cubic root of 20949331 is about 275.6703469866.

The spelling of 20949331 in words is "twenty million, nine hundred forty-nine thousand, three hundred thirty-one".