20377453 has 2 divisors, whose sum is σ = 20377454. Its totient is φ = 20377452.

The previous prime is 20377433. The next prime is 20377499. The reversal of 20377453 is 35477302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14722569 + 5654884 = 3837^2 + 2378^2 .

It is a cyclic number.

It is not a de Polignac number, because 20377453 - 2⁵ = 20377421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20377433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10188726 + 10188727.

It is an arithmetic number, because the mean of its divisors is an integer number (10188727).

Almost surely, 2^20377453 is an apocalyptic number.

It is an amenable number.

20377453 is a deficient number, since it is larger than the sum of its proper divisors (1).

20377453 is an equidigital number, since it uses as much as digits as its factorization.

20377453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 31.

The square root of 20377453 is about 4514.1392313485. The cubic root of 20377453 is about 273.1387389822.

The spelling of 20377453 in words is "twenty million, three hundred seventy-seven thousand, four hundred fifty-three".