20364451 has 2 divisors, whose sum is σ = 20364452. Its totient is φ = 20364450.

The previous prime is 20364437. The next prime is 20364457. The reversal of 20364451 is 15446302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20364451 is a prime.

It is not a weakly prime, because it can be changed into another prime (20364457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10182225 + 10182226.

It is an arithmetic number, because the mean of its divisors is an integer number (10182226).

Almost surely, 2^20364451 is an apocalyptic number.

20364451 is a deficient number, since it is larger than the sum of its proper divisors (1).

20364451 is an equidigital number, since it uses as much as digits as its factorization.

20364451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20364451 is about 4512.6988598842. The cubic root of 20364451 is about 273.0806338226.

The spelling of 20364451 in words is "twenty million, three hundred sixty-four thousand, four hundred fifty-one".