21430092 has 24 divisors (see below), whose sum is σ = 50111152. Its totient is φ = 7128000.

The previous prime is 21430091. The next prime is 21430103. The reversal of 21430092 is 29003412.

It is not an unprimeable number, because it can be changed into a prime (21430091) 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, 4842 + ... + 8142.

Almost surely, 2^21430092 is an apocalyptic number.

It is an amenable number.

21430092 is an abundant number, since it is smaller than the sum of its proper divisors (28681060).

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

21430092 is a wasteful number, since it uses less digits than its factorization.

21430092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3849 (or 3847 counting only the distinct ones).

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

The square root of 21430092 is about 4629.2647364349. The cubic root of 21430092 is about 277.7631818583.

The spelling of 21430092 in words is "twenty-one million, four hundred thirty thousand, ninety-two".