20391162 has 24 divisors (see below), whose sum is σ = 44828448. Its totient is φ = 6178920.

The previous prime is 20391157. The next prime is 20391169. The reversal of 20391162 is 26119302.

It is not an unprimeable number, because it can be changed into a prime (20391169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13318 + ... + 14769.

It is an arithmetic number, because the mean of its divisors is an integer number (1867852).

Almost surely, 2^20391162 is an apocalyptic number.

20391162 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20391162 is an abundant number, since it is smaller than the sum of its proper divisors (24437286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20391162 is a wasteful number, since it uses less digits than its factorization.

20391162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28114 (or 28103 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 20391162 is about 4515.6574272192. The cubic root of 20391162 is about 273.1999769198.

The spelling of 20391162 in words is "twenty million, three hundred ninety-one thousand, one hundred sixty-two".