20319601 has 4 divisors (see below), whose sum is σ = 20975104. Its totient is φ = 19664100.

The previous prime is 20319599. The next prime is 20319613. The reversal of 20319601 is 10691302.

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 20319601 - 2¹ = 20319599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20319631) 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, 327705 + ... + 327766.

It is an arithmetic number, because the mean of its divisors is an integer number (5243776).

Almost surely, 2^20319601 is an apocalyptic number.

It is an amenable number.

20319601 is a deficient number, since it is larger than the sum of its proper divisors (655503).

20319601 is an equidigital number, since it uses as much as digits as its factorization.

20319601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655502.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 20319601 is about 4507.7268107107. The cubic root of 20319601 is about 272.8800118543.

The spelling of 20319601 in words is "twenty million, three hundred nineteen thousand, six hundred one".