21301018 has 16 divisors (see below), whose sum is σ = 32887296. Its totient is φ = 10342800.

The previous prime is 21300997. The next prime is 21301031. The reversal of 21301018 is 81010312.

It is a junction number, because it is equal to n+sod(n) for n = 21300992 and 21301010.

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, 9943 + ... + 11893.

It is an arithmetic number, because the mean of its divisors is an integer number (2055456).

Almost surely, 2^21301018 is an apocalyptic number.

21301018 is a deficient number, since it is larger than the sum of its proper divisors (11586278).

21301018 is a wasteful number, since it uses less digits than its factorization.

21301018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 21301018 is about 4615.3025902968. The cubic root of 21301018 is about 277.2044002169.

The spelling of 21301018 in words is "twenty-one million, three hundred one thousand, eighteen".