20712219 has 8 divisors (see below), whose sum is σ = 30126912. Its totient is φ = 12552840.

The previous prime is 20712199. The next prime is 20712221. The reversal of 20712219 is 91221702.

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

It is not a de Polignac number, because 20712219 - 2⁵ = 20712187 is a prime.

It is a super-2 number, since 2×20712219² = 857992031807922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20712019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313789 + ... + 313854.

It is an arithmetic number, because the mean of its divisors is an integer number (3765864).

Almost surely, 2^20712219 is an apocalyptic number.

20712219 is a deficient number, since it is larger than the sum of its proper divisors (9414693).

20712219 is a wasteful number, since it uses less digits than its factorization.

20712219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627657.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 20712219 is about 4551.0678966590. The cubic root of 20712219 is about 274.6263531561.

The spelling of 20712219 in words is "twenty million, seven hundred twelve thousand, two hundred nineteen".