20695043 has 4 divisors (see below), whose sum is σ = 21034368. Its totient is φ = 20355720.

The previous prime is 20695033. The next prime is 20695061. The reversal of 20695043 is 34059602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20695043 - 2⁶ = 20694979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20694997 and 20695015.

It is not an unprimeable number, because it can be changed into a prime (20695033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169571 + ... + 169692.

It is an arithmetic number, because the mean of its divisors is an integer number (5258592).

Almost surely, 2^20695043 is an apocalyptic number.

20695043 is a deficient number, since it is larger than the sum of its proper divisors (339325).

20695043 is an equidigital number, since it uses as much as digits as its factorization.

20695043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339324.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 20695043 is about 4549.1804756461. The cubic root of 20695043 is about 274.5504191270.

The spelling of 20695043 in words is "twenty million, six hundred ninety-five thousand, forty-three".