21340092 has 12 divisors (see below), whose sum is σ = 49793576. Its totient is φ = 7113360.

The previous prime is 21340091. The next prime is 21340093. The reversal of 21340092 is 29004312.

It is an interprime number because it is at equal distance from previous prime (21340091) and next prime (21340093).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21340091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889159 + ... + 889182.

Almost surely, 2^21340092 is an apocalyptic number.

It is an amenable number.

21340092 is an abundant number, since it is smaller than the sum of its proper divisors (28453484).

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

21340092 is a wasteful number, since it uses less digits than its factorization.

21340092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778348 (or 1778346 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 21340092 is about 4619.5337427061. The cubic root of 21340092 is about 277.3737953836.

The spelling of 21340092 in words is "twenty-one million, three hundred forty thousand, ninety-two".