20644514 has 8 divisors (see below), whose sum is σ = 33781968. Its totient is φ = 9383860.

The previous prime is 20644489. The next prime is 20644537. The reversal of 20644514 is 41544602.

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

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, 469172 + ... + 469215.

It is an arithmetic number, because the mean of its divisors is an integer number (4222746).

Almost surely, 2^20644514 is an apocalyptic number.

20644514 is a deficient number, since it is larger than the sum of its proper divisors (13137454).

20644514 is a wasteful number, since it uses less digits than its factorization.

20644514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938400.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 20644514 is about 4543.6234439047. The cubic root of 20644514 is about 274.3267896643.

The spelling of 20644514 in words is "twenty million, six hundred forty-four thousand, five hundred fourteen".