20275379 has 4 divisors (see below), whose sum is σ = 20974560. Its totient is φ = 19576200.

The previous prime is 20275369. The next prime is 20275391. The reversal of 20275379 is 97357202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97357202 = 2 ⋅48678601.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20275379 is a prime.

It is a super-2 number, since 2×20275379² = 822181987187282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20275349) 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, 349547 + ... + 349604.

It is an arithmetic number, because the mean of its divisors is an integer number (5243640).

Almost surely, 2^20275379 is an apocalyptic number.

20275379 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20275379 is a deficient number, since it is larger than the sum of its proper divisors (699181).

20275379 is an equidigital number, since it uses as much as digits as its factorization.

20275379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699180.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 20275379 is about 4502.8190059117. The cubic root of 20275379 is about 272.6819097919.

The spelling of 20275379 in words is "twenty million, two hundred seventy-five thousand, three hundred seventy-nine".