20862379 has 4 divisors (see below), whose sum is σ = 20877880. Its totient is φ = 20846880.

The previous prime is 20862343. The next prime is 20862409. The reversal of 20862379 is 97326802.

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

It is a cyclic number.

It is not a de Polignac number, because 20862379 - 2⁷ = 20862251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20862329) 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, 5517 + ... + 8494.

It is an arithmetic number, because the mean of its divisors is an integer number (5219470).

Almost surely, 2^20862379 is an apocalyptic number.

20862379 is a deficient number, since it is larger than the sum of its proper divisors (15501).

20862379 is a wasteful number, since it uses less digits than its factorization.

20862379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15500.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20862379 is about 4567.5353310073. The cubic root of 20862379 is about 275.2884202638.

It can be divided in two parts, 2086 and 2379, that added together give a triangular number (4465 = T₉₄).

The spelling of 20862379 in words is "twenty million, eight hundred sixty-two thousand, three hundred seventy-nine".