20347634 has 4 divisors (see below), whose sum is σ = 30521454. Its totient is φ = 10173816.

The previous prime is 20347633. The next prime is 20347661. The reversal of 20347634 is 43674302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10582009 + 9765625 = 3253^2 + 3125^2 .

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 20347597 and 20347606.

It is not an unprimeable number, because it can be changed into a prime (20347631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5086907 + ... + 5086910.

Almost surely, 2^20347634 is an apocalyptic number.

20347634 is a deficient number, since it is larger than the sum of its proper divisors (10173820).

20347634 is a wasteful number, since it uses less digits than its factorization.

20347634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10173819.

The product of its (nonzero) digits is 12096, while the sum is 29.

The square root of 20347634 is about 4510.8351776583. The cubic root of 20347634 is about 273.0054429629.

The spelling of 20347634 in words is "twenty million, three hundred forty-seven thousand, six hundred thirty-four".