20373797 has 4 divisors (see below), whose sum is σ = 20391756. Its totient is φ = 20355840.

The previous prime is 20373781. The next prime is 20373799. The reversal of 20373797 is 79737302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14737921 + 5635876 = 3839^2 + 2374^2 .

It is a cyclic number.

It is not a de Polignac number, because 20373797 - 2⁴ = 20373781 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20373797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20373799) 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, 7154 + ... + 9587.

It is an arithmetic number, because the mean of its divisors is an integer number (5097939).

Almost surely, 2^20373797 is an apocalyptic number.

It is an amenable number.

20373797 is a deficient number, since it is larger than the sum of its proper divisors (17959).

20373797 is a wasteful number, since it uses less digits than its factorization.

20373797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17958.

The product of its (nonzero) digits is 55566, while the sum is 38.

The square root of 20373797 is about 4513.7342633345. The cubic root of 20373797 is about 273.1224030355.

The spelling of 20373797 in words is "twenty million, three hundred seventy-three thousand, seven hundred ninety-seven".