20931230 has 8 divisors (see below), whose sum is σ = 37676232. Its totient is φ = 8372488.

The previous prime is 20931223. The next prime is 20931241. The reversal of 20931230 is 3213902.

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

It is a congruent number.

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, 1046552 + ... + 1046571.

It is an arithmetic number, because the mean of its divisors is an integer number (4709529).

Almost surely, 2^20931230 is an apocalyptic number.

20931230 is a deficient number, since it is larger than the sum of its proper divisors (16745002).

20931230 is a wasteful number, since it uses less digits than its factorization.

20931230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093130.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 20931230 is about 4575.0661197408. The cubic root of 20931230 is about 275.5909276359.

The spelling of 20931230 in words is "twenty million, nine hundred thirty-one thousand, two hundred thirty".