20634219 has 6 divisors (see below), whose sum is σ = 29804996. Its totient is φ = 13756140.

The previous prime is 20634217. The next prime is 20634221. The reversal of 20634219 is 91243602.

20634219 is a `hidden beast` number, since 2 + 0 + 634 + 21 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (20634217) and next prime (20634221).

It is not a de Polignac number, because 20634219 - 2¹ = 20634217 is a prime.

It is a super-2 number, since 2×20634219² = 851541987479922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20634192 and 20634201.

It is not an unprimeable number, because it can be changed into a prime (20634217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1146337 + ... + 1146354.

Almost surely, 2^20634219 is an apocalyptic number.

20634219 is a deficient number, since it is larger than the sum of its proper divisors (9170777).

20634219 is a wasteful number, since it uses less digits than its factorization.

20634219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292697 (or 2292694 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20634219 is about 4542.4903962474. The cubic root of 20634219 is about 274.2811816820.

The spelling of 20634219 in words is "twenty million, six hundred thirty-four thousand, two hundred nineteen".