20874977 has 8 divisors (see below), whose sum is σ = 22070400. Its totient is φ = 19689264.

The previous prime is 20874949. The next prime is 20874979. The reversal of 20874977 is 77947802.

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 20874977 - 2⁶ = 20874913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20874979) by changing a digit.

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, 2243 + ... + 6839.

It is an arithmetic number, because the mean of its divisors is an integer number (2758800).

Almost surely, 2^20874977 is an apocalyptic number.

It is an amenable number.

20874977 is a deficient number, since it is larger than the sum of its proper divisors (1195423).

20874977 is a wasteful number, since it uses less digits than its factorization.

20874977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4855.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 20874977 is about 4568.9142036156. The cubic root of 20874977 is about 275.3438211950.

The spelling of 20874977 in words is "twenty million, eight hundred seventy-four thousand, nine hundred seventy-seven".