20701451 has 2 divisors, whose sum is σ = 20701452. Its totient is φ = 20701450.

The previous prime is 20701441. The next prime is 20701453. The reversal of 20701451 is 15410702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20701451 - 2²² = 16507147 is a prime.

It is a Sophie Germain prime.

Together with 20701453, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20701453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10350725 + 10350726.

It is an arithmetic number, because the mean of its divisors is an integer number (10350726).

Almost surely, 2^20701451 is an apocalyptic number.

20701451 is a deficient number, since it is larger than the sum of its proper divisors (1).

20701451 is an equidigital number, since it uses as much as digits as its factorization.

20701451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 20701451 is about 4549.8847238144. The cubic root of 20701451 is about 274.5787534086.

The spelling of 20701451 in words is "twenty million, seven hundred one thousand, four hundred fifty-one".