21202092 has 18 divisors (see below), whose sum is σ = 53594268. Its totient is φ = 7067352.

The previous prime is 21202079. The next prime is 21202121. The reversal of 21202092 is 29020212.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 294438 + ... + 294509.

Almost surely, 2^21202092 is an apocalyptic number.

It is an amenable number.

21202092 is an abundant number, since it is smaller than the sum of its proper divisors (32392176).

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

21202092 is a wasteful number, since it uses less digits than its factorization.

21202092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588957 (or 588952 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 21202092 is about 4604.5729443674. The cubic root of 21202092 is about 276.7746040997.

The spelling of 21202092 in words is "twenty-one million, two hundred two thousand, ninety-two".