20203977 has 8 divisors (see below), whose sum is σ = 27027616. Its totient is φ = 13424832.

The previous prime is 20203969. The next prime is 20204003. The reversal of 20203977 is 77930202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20203977 - 2³ = 20203969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20203907) 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, 10048 + ... + 11889.

It is an arithmetic number, because the mean of its divisors is an integer number (3378452).

Almost surely, 2^20203977 is an apocalyptic number.

It is an amenable number.

20203977 is a deficient number, since it is larger than the sum of its proper divisors (6823639).

20203977 is a wasteful number, since it uses less digits than its factorization.

20203977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22247.

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 20203977 is about 4494.8834245173. The cubic root of 20203977 is about 272.3614400925.

The spelling of 20203977 in words is "twenty million, two hundred three thousand, nine hundred seventy-seven".