20739106 has 4 divisors (see below), whose sum is σ = 31108662. Its totient is φ = 10369552.

The previous prime is 20739101. The next prime is 20739107. The reversal of 20739106 is 60193702.

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., 20169081 + 570025 = 4491^2 + 755^2 .

It is a super-2 number, since 2×20739106² = 860221035358472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20739101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5184775 + ... + 5184778.

Almost surely, 2^20739106 is an apocalyptic number.

20739106 is a deficient number, since it is larger than the sum of its proper divisors (10369556).

20739106 is a wasteful number, since it uses less digits than its factorization.

20739106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10369555.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 20739106 is about 4554.0208607340. The cubic root of 20739106 is about 274.7451346670.

The spelling of 20739106 in words is "twenty million, seven hundred thirty-nine thousand, one hundred six".