21620092 has 24 divisors (see below), whose sum is σ = 42519456. Its totient is φ = 9544128.

The previous prime is 21620087. The next prime is 21620101. The reversal of 21620092 is 29002612.

It is a happy number.

It is a congruent number.

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, 7843 + ... + 10234.

It is an arithmetic number, because the mean of its divisors is an integer number (1771644).

Almost surely, 2^21620092 is an apocalyptic number.

It is an amenable number.

21620092 is a deficient number, since it is larger than the sum of its proper divisors (20899364).

21620092 is a wasteful number, since it uses less digits than its factorization.

21620092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18117 (or 18115 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 21620092 is about 4649.7410680596. The cubic root of 21620092 is about 278.5816539999.

The spelling of 21620092 in words is "twenty-one million, six hundred twenty thousand, ninety-two".