21093036 has 48 divisors (see below), whose sum is σ = 50803200. Its totient is φ = 6808000.

The previous prime is 21093029. The next prime is 21093041. The reversal of 21093036 is 63039012.

It is a junction number, because it is equal to n+sod(n) for n = 21092997 and 21093015.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83911 + ... + 84161.

It is an arithmetic number, because the mean of its divisors is an integer number (1058400).

Almost surely, 2^21093036 is an apocalyptic number.

It is an amenable number.

21093036 is an abundant number, since it is smaller than the sum of its proper divisors (29710164).

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

21093036 is a wasteful number, since it uses less digits than its factorization.

21093036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 21093036 is about 4592.7155365862. The cubic root of 21093036 is about 276.2992448535.

The spelling of 21093036 in words is "twenty-one million, ninety-three thousand, thirty-six".