23021618 has 8 divisors (see below), whose sum is σ = 34739712. Its totient is φ = 11441716.

The previous prime is 23021567. The next prime is 23021639. The reversal of 23021618 is 81612032.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23021593 and 23021602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34130 + ... + 34797.

It is an arithmetic number, because the mean of its divisors is an integer number (4342464).

Almost surely, 2^23021618 is an apocalyptic number.

23021618 is a deficient number, since it is larger than the sum of its proper divisors (11718094).

23021618 is a wasteful number, since it uses less digits than its factorization.

23021618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69096.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 23021618 is about 4798.0848262614. The cubic root of 23021618 is about 284.4757696734.

The spelling of 23021618 in words is "twenty-three million, twenty-one thousand, six hundred eighteen".