20738824 has 32 divisors (see below), whose sum is σ = 40824000. Its totient is φ = 9858112.

The previous prime is 20738821. The next prime is 20738831. The reversal of 20738824 is 42883702.

It is a self number, because there is not a number n which added to its sum of digits gives 20738824.

It is not an unprimeable number, because it can be changed into a prime (20738821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49287 + ... + 49705.

It is an arithmetic number, because the mean of its divisors is an integer number (1275750).

Almost surely, 2^20738824 is an apocalyptic number.

It is an amenable number.

20738824 is a deficient number, since it is larger than the sum of its proper divisors (20085176).

20738824 is a wasteful number, since it uses less digits than its factorization.

20738824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717 (or 713 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 20738824 is about 4553.9898989787. The cubic root of 20738824 is about 274.7438893790.

The spelling of 20738824 in words is "twenty million, seven hundred thirty-eight thousand, eight hundred twenty-four".