20193937 has 4 divisors (see below), whose sum is σ = 20341476. Its totient is φ = 20046400.

The previous prime is 20193913. The next prime is 20193949. The reversal of 20193937 is 73939102.

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 10233601 + 9960336 = 3199^2 + 3156^2 .

It is a cyclic number.

It is not a de Polignac number, because 20193937 - 2²³ = 11805329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20193967) 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, 73564 + ... + 73837.

It is an arithmetic number, because the mean of its divisors is an integer number (5085369).

Almost surely, 2^20193937 is an apocalyptic number.

It is an amenable number.

20193937 is a deficient number, since it is larger than the sum of its proper divisors (147539).

20193937 is a wasteful number, since it uses less digits than its factorization.

20193937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147538.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 20193937 is about 4493.7664603315. The cubic root of 20193937 is about 272.3163175911.

The spelling of 20193937 in words is "twenty million, one hundred ninety-three thousand, nine hundred thirty-seven".