20139622 has 8 divisors (see below), whose sum is σ = 30384576. Its totient is φ = 10011432.

The previous prime is 20139619. The next prime is 20139643. The reversal of 20139622 is 22693102.

It is a happy number.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28758 + ... + 29449.

It is an arithmetic number, because the mean of its divisors is an integer number (3798072).

Almost surely, 2^20139622 is an apocalyptic number.

20139622 is a deficient number, since it is larger than the sum of its proper divisors (10244954).

20139622 is a wasteful number, since it uses less digits than its factorization.

20139622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58382.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20139622 is about 4487.7190197248. The cubic root of 20139622 is about 272.0719514813.

The spelling of 20139622 in words is "twenty million, one hundred thirty-nine thousand, six hundred twenty-two".