20639030 has 8 divisors (see below), whose sum is σ = 37150272. Its totient is φ = 8255608.

The previous prime is 20639023. The next prime is 20639057. The reversal of 20639030 is 3093602.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20638987 and 20639005.

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, 1031942 + ... + 1031961.

It is an arithmetic number, because the mean of its divisors is an integer number (4643784).

Almost surely, 2^20639030 is an apocalyptic number.

20639030 is a deficient number, since it is larger than the sum of its proper divisors (16511242).

20639030 is a wasteful number, since it uses less digits than its factorization.

20639030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063910.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 20639030 is about 4543.0199207135. The cubic root of 20639030 is about 274.3024968288.

The spelling of 20639030 in words is "twenty million, six hundred thirty-nine thousand, thirty".