20373953 has 4 divisors (see below), whose sum is σ = 20560980. Its totient is φ = 20186928.

The previous prime is 20373943. The next prime is 20373967. The reversal of 20373953 is 35937302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35937302 = 2 ⋅17968651.

It can be written as a sum of positive squares in 2 ways, for example, as 17707264 + 2666689 = 4208^2 + 1633^2 .

It is a cyclic number.

It is not a de Polignac number, because 20373953 - 2⁸ = 20373697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20373923) 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, 93350 + ... + 93567.

It is an arithmetic number, because the mean of its divisors is an integer number (5140245).

Almost surely, 2^20373953 is an apocalyptic number.

It is an amenable number.

20373953 is a deficient number, since it is larger than the sum of its proper divisors (187027).

20373953 is a wasteful number, since it uses less digits than its factorization.

20373953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187026.

The product of its (nonzero) digits is 17010, while the sum is 32.

The square root of 20373953 is about 4513.7515438934. The cubic root of 20373953 is about 273.1231001235.

The spelling of 20373953 in words is "twenty million, three hundred seventy-three thousand, nine hundred fifty-three".