21139162 has 16 divisors (see below), whose sum is σ = 36096192. Its totient is φ = 9190720.

The previous prime is 21139159. The next prime is 21139163. The reversal of 21139162 is 26193112.

It is not an unprimeable number, because it can be changed into a prime (21139163) 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, 20383 + ... + 21394.

It is an arithmetic number, because the mean of its divisors is an integer number (2256012).

Almost surely, 2^21139162 is an apocalyptic number.

21139162 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21139162 is a deficient number, since it is larger than the sum of its proper divisors (14957030).

21139162 is a wasteful number, since it uses less digits than its factorization.

21139162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41813.

The product of its digits is 648, while the sum is 25.

The square root of 21139162 is about 4597.7344420921. The cubic root of 21139162 is about 276.5005008564.

The spelling of 21139162 in words is "twenty-one million, one hundred thirty-nine thousand, one hundred sixty-two".