20347268 has 6 divisors (see below), whose sum is σ = 35607726. Its totient is φ = 10173632.

The previous prime is 20347267. The next prime is 20347289. The reversal of 20347268 is 86274302.

It can be written as a sum of positive squares in only one way, i.e., 16630084 + 3717184 = 4078^2 + 1928^2 .

It is a super-2 number, since 2×20347268² = 828022630127648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20347267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2543405 + ... + 2543412.

It is an arithmetic number, because the mean of its divisors is an integer number (5934621).

Almost surely, 2^20347268 is an apocalyptic number.

It is an amenable number.

20347268 is a deficient number, since it is larger than the sum of its proper divisors (15260458).

20347268 is a wasteful number, since it uses less digits than its factorization.

20347268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5086821 (or 5086819 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 20347268 is about 4510.7946084919. The cubic root of 20347268 is about 273.0038060716.

The spelling of 20347268 in words is "twenty million, three hundred forty-seven thousand, two hundred sixty-eight".