20977324 has 24 divisors (see below), whose sum is σ = 38278800. Its totient is φ = 10046400.

The previous prime is 20977321. The next prime is 20977331. The reversal of 20977324 is 42377902.

It is a self number, because there is not a number n which added to its sum of digits gives 20977324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20977321) 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, 15474 + ... + 16774.

It is an arithmetic number, because the mean of its divisors is an integer number (1594950).

Almost surely, 2^20977324 is an apocalyptic number.

It is an amenable number.

20977324 is a deficient number, since it is larger than the sum of its proper divisors (17301476).

20977324 is a wasteful number, since it uses less digits than its factorization.

20977324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473 (or 1471 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 20977324 is about 4580.1008722516. The cubic root of 20977324 is about 275.7930781202.

The spelling of 20977324 in words is "twenty million, nine hundred seventy-seven thousand, three hundred twenty-four".