20949384 has 32 divisors (see below), whose sum is σ = 52583040. Its totient is φ = 6955200.

The previous prime is 20949371. The next prime is 20949421. The reversal of 20949384 is 48394902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4894 + ... + 8114.

It is an arithmetic number, because the mean of its divisors is an integer number (1643220).

Almost surely, 2^20949384 is an apocalyptic number.

20949384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20949384 is an abundant number, since it is smaller than the sum of its proper divisors (31633656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20949384 is a wasteful number, since it uses less digits than its factorization.

20949384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501 (or 3497 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 20949384 is about 4577.0497047771. The cubic root of 20949384 is about 275.6705794604.

The spelling of 20949384 in words is "twenty million, nine hundred forty-nine thousand, three hundred eighty-four".