20376397 has 4 divisors (see below), whose sum is σ = 20450236. Its totient is φ = 20302560.

The previous prime is 20376373. The next prime is 20376439. The reversal of 20376397 is 79367302.

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 2643876 + 17732521 = 1626^2 + 4211^2 .

It is a cyclic number.

It is not a de Polignac number, because 20376397 - 2¹⁵ = 20343629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20376347) 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, 36504 + ... + 37057.

It is an arithmetic number, because the mean of its divisors is an integer number (5112559).

Almost surely, 2^20376397 is an apocalyptic number.

It is an amenable number.

20376397 is a deficient number, since it is larger than the sum of its proper divisors (73839).

20376397 is an equidigital number, since it uses as much as digits as its factorization.

20376397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73838.

The product of its (nonzero) digits is 47628, while the sum is 37.

The square root of 20376397 is about 4514.0222640124. The cubic root of 20376397 is about 273.1340207037.

The spelling of 20376397 in words is "twenty million, three hundred seventy-six thousand, three hundred ninety-seven".