21364122 has 16 divisors (see below), whose sum is σ = 46015200. Its totient is φ = 6573552.

The previous prime is 21364111. The next prime is 21364127. The reversal of 21364122 is 22146312.

It is not an unprimeable number, because it can be changed into a prime (21364127) 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, 136872 + ... + 137027.

It is an arithmetic number, because the mean of its divisors is an integer number (2875950).

Almost surely, 2^21364122 is an apocalyptic number.

21364122 is an abundant number, since it is smaller than the sum of its proper divisors (24651078).

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

21364122 is a wasteful number, since it uses less digits than its factorization.

21364122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273917.

The product of its digits is 576, while the sum is 21.

The square root of 21364122 is about 4622.1339227677. The cubic root of 21364122 is about 277.4778685377.

The spelling of 21364122 in words is "twenty-one million, three hundred sixty-four thousand, one hundred twenty-two".