21046938 has 32 divisors (see below), whose sum is σ = 46103040. Its totient is φ = 6352560.

The previous prime is 21046933. The next prime is 21046939. The reversal of 21046938 is 83964012.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 21046899 and 21046908.

It is not an unprimeable number, because it can be changed into a prime (21046933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22443 + ... + 23361.

It is an arithmetic number, because the mean of its divisors is an integer number (1440720).

Almost surely, 2^21046938 is an apocalyptic number.

21046938 is an abundant number, since it is smaller than the sum of its proper divisors (25056102).

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

21046938 is a wasteful number, since it uses less digits than its factorization.

21046938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 21046938 is about 4587.6941920751. The cubic root of 21046938 is about 276.0978176701.

The spelling of 21046938 in words is "twenty-one million, forty-six thousand, nine hundred thirty-eight".