20361769 has 4 divisors (see below), whose sum is σ = 20665744. Its totient is φ = 20057796.

The previous prime is 20361751. The next prime is 20361791. The reversal of 20361769 is 96716302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20361769 - 2⁷ = 20361641 is a prime.

It is a super-2 number, since 2×20361769² = 829203273618722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20361709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151887 + ... + 152020.

It is an arithmetic number, because the mean of its divisors is an integer number (5166436).

Almost surely, 2^20361769 is an apocalyptic number.

It is an amenable number.

20361769 is a deficient number, since it is larger than the sum of its proper divisors (303975).

20361769 is an equidigital number, since it uses as much as digits as its factorization.

20361769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303974.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 20361769 is about 4512.4016886798. The cubic root of 20361769 is about 273.0686450484.

The spelling of 20361769 in words is "twenty million, three hundred sixty-one thousand, seven hundred sixty-nine".