20540377 has 16 divisors (see below), whose sum is σ = 24272640. Its totient is φ = 17136000.

The previous prime is 20540353. The next prime is 20540393. The reversal of 20540377 is 77304502.

It is a cyclic number.

It is not a de Polignac number, because 20540377 - 2⁷ = 20540249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20540477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33877 + ... + 34477.

It is an arithmetic number, because the mean of its divisors is an integer number (1517040).

Almost surely, 2^20540377 is an apocalyptic number.

It is an amenable number.

20540377 is a deficient number, since it is larger than the sum of its proper divisors (3732263).

20540377 is a wasteful number, since it uses less digits than its factorization.

20540377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864.

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 20540377 is about 4532.1492693864. The cubic root of 20540377 is about 273.8647502355.

Adding to 20540377 its reverse (77304502), we get a palindrome (97844879).

The spelling of 20540377 in words is "twenty million, five hundred forty thousand, three hundred seventy-seven".