20870379 has 40 divisors (see below), whose sum is σ = 33454080. Its totient is φ = 12927600.

The previous prime is 20870371. The next prime is 20870389. The reversal of 20870379 is 97307802.

It is not a de Polignac number, because 20870379 - 2³ = 20870371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20870371) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 109174 + ... + 109364.

It is an arithmetic number, because the mean of its divisors is an integer number (836352).

Almost surely, 2^20870379 is an apocalyptic number.

20870379 is a deficient number, since it is larger than the sum of its proper divisors (12583701).

20870379 is a wasteful number, since it uses less digits than its factorization.

20870379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 20870379 is about 4568.4109928946. The cubic root of 20870379 is about 275.3236036262.

The spelling of 20870379 in words is "twenty million, eight hundred seventy thousand, three hundred seventy-nine".