20538077 has 12 divisors (see below), whose sum is σ = 23977440. Its totient is φ = 17228088.

The previous prime is 20538043. The next prime is 20538109. The reversal of 20538077 is 77083502.

It is not a de Polignac number, because 20538077 - 2⁸ = 20537821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20534077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91988 + ... + 92210.

It is an arithmetic number, because the mean of its divisors is an integer number (1998120).

Almost surely, 2^20538077 is an apocalyptic number.

It is an amenable number.

20538077 is a deficient number, since it is larger than the sum of its proper divisors (3439363).

20538077 is an frugal number, since it uses more digits than its factorization.

20538077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 20538077 is about 4531.8955195371. The cubic root of 20538077 is about 273.8545278909.

The spelling of 20538077 in words is "twenty million, five hundred thirty-eight thousand, seventy-seven".