20347673 has 2 divisors, whose sum is σ = 20347674. Its totient is φ = 20347672.

The previous prime is 20347667. The next prime is 20347681. The reversal of 20347673 is 37674302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18983449 + 1364224 = 4357^2 + 1168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20347673 is a prime.

It is not a weakly prime, because it can be changed into another prime (20347633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10173836 + 10173837.

It is an arithmetic number, because the mean of its divisors is an integer number (10173837).

Almost surely, 2^20347673 is an apocalyptic number.

It is an amenable number.

20347673 is a deficient number, since it is larger than the sum of its proper divisors (1).

20347673 is an equidigital number, since it uses as much as digits as its factorization.

20347673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 32.

The square root of 20347673 is about 4510.8395005808. The cubic root of 20347673 is about 273.0056173845.

The spelling of 20347673 in words is "twenty million, three hundred forty-seven thousand, six hundred seventy-three".