21369192 has 32 divisors (see below), whose sum is σ = 57533280. Its totient is φ = 6575040.

The previous prime is 21369109. The next prime is 21369209. The reversal of 21369192 is 29196312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33934 + ... + 34557.

It is an arithmetic number, because the mean of its divisors is an integer number (1797915).

Almost surely, 2^21369192 is an apocalyptic number.

It is an amenable number.

21369192 is an abundant number, since it is smaller than the sum of its proper divisors (36164088).

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

21369192 is a wasteful number, since it uses less digits than its factorization.

21369192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68513 (or 68509 counting only the distinct ones).

The product of its digits is 5832, while the sum is 33.

The square root of 21369192 is about 4622.6823382101. The cubic root of 21369192 is about 277.4998165732.

The spelling of 21369192 in words is "twenty-one million, three hundred sixty-nine thousand, one hundred ninety-two".