20392851 has 8 divisors (see below), whose sum is σ = 27518400. Its totient is φ = 13431272.

The previous prime is 20392847. The next prime is 20392873. The reversal of 20392851 is 15829302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20392851 - 2² = 20392847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20392831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40701 + ... + 41198.

It is an arithmetic number, because the mean of its divisors is an integer number (3439800).

Almost surely, 2^20392851 is an apocalyptic number.

20392851 is a deficient number, since it is larger than the sum of its proper divisors (7125549).

20392851 is an equidigital number, since it uses as much as digits as its factorization.

20392851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81985.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 20392851 is about 4515.8444393048. The cubic root of 20392851 is about 273.2075197631.

The spelling of 20392851 in words is "twenty million, three hundred ninety-two thousand, eight hundred fifty-one".