20374387 has 4 divisors (see below), whose sum is σ = 22226616. Its totient is φ = 18522160.

The previous prime is 20374369. The next prime is 20374391. The reversal of 20374387 is 78347302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20374387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20374357) 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, 926098 + ... + 926119.

It is an arithmetic number, because the mean of its divisors is an integer number (5556654).

Almost surely, 2^20374387 is an apocalyptic number.

20374387 is a deficient number, since it is larger than the sum of its proper divisors (1852229).

20374387 is a wasteful number, since it uses less digits than its factorization.

20374387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852228.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 20374387 is about 4513.7996189463. The cubic root of 20374387 is about 273.1250394392.

The spelling of 20374387 in words is "twenty million, three hundred seventy-four thousand, three hundred eighty-seven".